INATURALIST Observations 256960428
GBIFID: 5007517103; Occurrence Remarks: Southernmost locale for atratus;; Coordinate Uncertainty in Meters: 129.00000.

INATURALIST Observations 272560700
GBIFID: 5140117606;; Coordinate Uncertainty in Meters: 5.00000.

INATURALIST Observations 334170033
San Luis Obispo, California: 35.268433, -120.70153: : 4/29/2025: kdisselhorst: 29 Apr 2025 ; Coordinate Uncertainty in Meters: 4.00000.

San Luis Obispo, California: 35.26527, -120.698565: : 11/13/2025: Maev Douglas: 13 Nov 2025 ; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 5036828244;; Coordinate Uncertainty in Meters: 28706.00000.

GBIFID: 2311344226;; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks:; Coordinate Uncertainty in Meters: 28706.00000.

San Luis Obispo, California: 35.281709, -120.887715: : 11/28/2025: josuecelio: 28 Nov 2025 ; Coordinate Uncertainty in Meters: 6.00000.

San Luis Obispo, California: 35.347152, -120.728657: : 5/28/2017: Carmen Trotter-Grant: 28 May 2017 :

GBIFID: 891720052; Occurrence Remarks: Particularly bright yellow on this one.;; Coordinate Uncertainty in Meters: 0.11000.

San Luis Obispo, California: 35.771757, -121.388594: : 9/12/2024: ryansikola: 12 Sep 2024 ; Coordinate Uncertainty in Meters: 28649.00000.

Occurrence Remarks: I am struggling with the ID of coast vs aquatic garter in SLO County but to me the face looks more atratus hereΓÇª San Luis Obispo County; Coordinate Uncertainty in Meters: 28706.00000.

San Luis Obispo, California: 35.405482, -120.856692: : 4/24/2025: Will_K: 24 Apr 2025 ; Coordinate Uncertainty in Meters: 28677.00000.

San Luis Obispo, California: 35.759836, -121.319569: : 4/6/2026: serenamanuel: 6 Apr 2026 ; Coordinate Uncertainty in Meters: 1950.00000.

Occurrence Remarks: Found actively foraging underwater in a creek. IΓÇÖm thinking atratus based on scales and behavior, curious if anyone disagrees.; Coordinate Uncertainty in Meters: 28620.00000.

GBIFID: 4891985300; Occurrence Remarks: Thamnophis atratus x hammondii;; Coordinate Uncertainty in Meters: 28649.00000.

GBIFID: 3383937669; Occurrence Remarks: My understanding is that T. elegans in San Luis Obispo county are black and yellow with little to no red.;; Coordinate Uncertainty in Meters: 2.00000.

GBIFID: 3759417153; Occurrence Remarks: 4 found under flat rock near pond;; Coordinate Uncertainty in Meters: 9.00000.

Occurrence Remarks: Occurrence Remarks: aquatic?; Coordinate Uncertainty in Meters: 28563.00000.

Occurrence Remarks: Yellow striped on its sides along body; Coordinate Uncertainty in Meters: 2.00000.

Occurrence Remarks: Found by my mom; Coordinate Uncertainty in Meters: 34.00000.

Monterey, California: 36.361877, -121.824029: : 2/27/2026: servatis16: 27 Feb 2026 ; Coordinate Uncertainty in Meters: 3083.00000.

Monterey, California: 36.285978, -121.853011: : 4/24/2026: avernon21: 24 Apr 2026 ; Coordinate Uncertainty in Meters: 0.11000.

Monterey, California: 36.079167, -121.398842: : 6/7/2026: thecodfather: 7 Jun 2026 ; Coordinate Uncertainty in Meters: 7.00000.

GBIFID: 1850981272; Occurrence Remarks: Found in riparian area, upper devils creek.;; Coordinate Uncertainty in Meters: 30.00000.

GBIFID: 1092910376; Occurrence Remarks: Tony Iwane keyed this after I found this...;; Coordinate Uncertainty in Meters: 500.00000.

GBIFID: 4145535413; Occurrence Remarks: Garter Snake eating a Chorus Frog whoΓÇÖs body was much wider than the snakes head. There were many frogs around White Rock Lake (elev. 2000ft). Link to Pacific Chorus Frog (Pseudacris regilla) observation: https://www.inaturalist.org/observations/166002880 Range Map for Diablo Range Garter Snake (Thamnophis atratus ssp. zaxanthus) https://californiaherps.com/snakes/pages/t.a.zaxanthus.html Diablo Range Garter Snake (Thamnophis atratus ssp. zaxanthus) Endemic in California. Size: Adults are 18 - 40 inches long (46 - 102 cm). Most snakes encountered are generally 18 - 28 inches long (46 - 71 cm). Neonates are 7 - 10 inches ( 18 - 25 cm). Appearance: A medium-sized slender snake with a head barely wider than the neck and keeled dorsal scales. Some average scale counts: Average of 8 upper labial scales, 6 and 7 not enlarged. 11 lower labial scales. Rear pair of chin shields is longer than the front. The internasals are longer than they are wide and pointed in front. Average of 19 or 21 scales at mid-body. Color and Pattern: Ground color is gray, brown or black. There is distinct yellow or orange stripe on the back and a light stripe along the lower part of each side on the 2nd and 3rd scale rows. There may be small alternating dark spots on the sides, most noticable on juveniles. The throat is white or yellow, sometimes bright yellow. The underside is bluish or greenish sometimes with pink or yellow marks. Activity: Highly-aquatic snake, able to remain underwater, but also found away from water. Active during the day, and after dark during very hot weather. Can be active most of the year when conditions allow, but primarily found spring through fall. Defense: When threatened, this snake will often escape into water, hiding on the bottom. If it is frightened when picked up, it will often strike repeatedly and release feces from the cloaca and expel musk from anal glands. Diet and Feeding: Probably eats mainly amphibians and their larvae, including frogs, tadpoles, and aquatic salamander larvae (newts) but small fish are also eaten, and possibly small rodents. Leeches are also consumed. Adults tend to forage actively. Neonates are sit-and-wait foragers. Juveniles practice both types of foraging. Guide to Amphibians and Reptiles of California: https://californiaherps.com/snakes/pages/t.a.zaxanthus.html and https://californiaherps.com Per INat corbytender: T. atratus: Eyes are very googly (this is exaggerated by eating) with almost no supraocular overhang; the supralabials are lightly marked, the posterior ones are not very enlarged, and the 7th is wider than the 6th; internasals appear pointed at the front (not 100% sure) and definitely a little longer than the prefrontals. This is less diagnostic but I also find this iris color more characteristic of T. atratus and other couchii-complex garters and this constricted pupil is more typical for them than the other local species (though this can vary a lot depending on activity cycles). The following description is from Systematics of the Garter Snake Thamnophis atratus at the Southern End of Its Range by Jeff Boundy. Proceedings of the California Academy of Sciences Volume 51, No. 6, p. 328. 1999. ...midbody scale rows 19 (85%) or 17 (15%)... vertebral stripe relatively broad, averaging 3.2 (range 1.5 - 5.0) scale rows on the nape... vertebral stripe yellow to orange-yellow; lateral stripe conspicuous, pale green; dorsum dark gray to black; iris gray or brown; top of head dark, olive black, with a prominent parietal spot; supralabial suture marks narrow when present; demarcation between dorsal head color and pale supralabials distinct; chin cream, becoming bright yellow on the throat, grading to pale green in the thoracic region; ventral color darkening slightly posteriorly; midventral suffusion yellow to orange; dark markings absent from transverse ventral sutures; eye moderate in size... Identifying Gartersnakes all species of garter snake are often found in and around the water, and sometimes aquatics are found a long distance from any water, so the location is not a reliable way to ID them. To properly ID a garter in this area you would need a clear shot of the head scales per INat acastelein. Link to my confirmed Garter Snake observations, for comparison: Diablo Range Garter Snake (Thamnophis atratus ssp. zaxanthus) https://www.inaturalist.org/observations/166000829 Coast Garter Snake (Thamnophis elegans ssp. terrestris) https://www.inaturalist.org/observations/110554649 California Red-sided Garter Snake (Thamnophis sirtalis ssp. infernalis) https://www.inaturalist.org/observations/99493314 Key to California GartersnakesΓÇö A side-by-side comparison chart: Garter Snakes are in Colubrid Snakes (Colubridae) family. Most colubrids are not venomous, or have venom that is not known to be harmful to humans, and are mostly harmless. Some colubrids are described as opisthoglyphous rear-fanged, meaning they have elongated, grooved teeth located in the back of their upper jaws. Snakes: https://californiaherps.com/snakes/snakesmaps.html Guide to Amphibians and Reptiles of California: https://californiaherps.com Reptile Database (41 species of Garter Snakes worldwide as of 2/12/24) Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 3018029813; Occurrence Remarks: Scanned from an old slide. Date is accurate; time is not. Location should be accurate, but imprecise.;; Coordinate Uncertainty in Meters: 1000.00000.

GBIFID: 3355207872; Occurrence Remarks: On the beach;; Coordinate Uncertainty in Meters: 880.00000.

Monterey, California: 36.238137, -121.815087: : 8/30/2025: theforestseeker: 30 Aug 2025 ; Coordinate Uncertainty in Meters: 3.00000.

Monterey, California: 36.549177, -121.631757: : 5/20/2026: bobdahm: 20 May 2026 ; Coordinate Uncertainty in Meters: 778.00000.

Santa Cruz, California: 36.974881, -122.1167: : 2/28/2026: Lucas Vincenot: 28 Feb 2026 ; Coordinate Uncertainty in Meters: 0.11000.

Santa Cruz, California: 36.954078, -122.029707: : 10/18/2025: ntucey: 18 Oct 2025 ; Coordinate Uncertainty in Meters: 6.00000.

Santa Cruz, California: 36.952831, -122.059477: : 1/25/2026: danducky: 25 Jan 2026 ; Coordinate Uncertainty in Meters: 72.00000.

Santa Cruz, California: 36.981189, -122.023697: : 9/25/2025: James Maughn: 25 Sep 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: Not sure about the ID of Diablo range; Coordinate Uncertainty in Meters: 25.00000.

GBIFID: 3925179464; Occurrence Remarks: roughly a foot to foot and a half in length (12-18 in);; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 4522443643; Occurrence Remarks: There was an adult and a juvenile snake in the pond. Observed hunting and eating tadpoles.;; Coordinate Uncertainty in Meters: 28476.00000.

GBIFID: 4116467648; Occurrence Remarks: Within a short distance along Ca Hwy 1, four separate animal roadkill victims were seen. Bike riding frequently brings to forefront the frequency of these unfortunate events.;; Coordinate Uncertainty in Meters: 3.00000.

GBIFID: 1699361419; Occurrence Remarks: This snake looked nearly identical to the other one, but the head shape and internasals ided it as an atratus.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 2611317460; Occurrence Remarks: Found dead in trail, possible casualty of bike. Small pond with abundant tadpoles nearby;; Coordinate Uncertainty in Meters: 10.00000.

Monterey, California: 36.537385, -121.927935: : 6/23/2019: WichΓÇÖyanan (Jay) Limparungpatthanakij: 23 Jun 2019 :

GBIFID: 1500292457; Occurrence Remarks: First time seeing this species in the park in maybe a decade, and first time ever in this part of park. Previously Ive only seen them in one other small stream reach. Maybe related to drought.;; Coordinate Uncertainty in Meters: 28534.00000.

GBIFID: 1572334301; Occurrence Remarks: Seen emerging from the pond from which tree frog tadpoles have been disappearing...;; Coordinate Uncertainty in Meters: 28534.00000.

GBIFID: 3090795973; Occurrence Remarks: Probable bike kill;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 3109164956; Occurrence Remarks: Looked like last moments of life. Head was hit by a biker :(;; Coordinate Uncertainty in Meters: 90.00000.

GBIFID: 3124816661; Occurrence Remarks: Dark individual;; Coordinate Uncertainty in Meters: 15.00000.

GBIFID: 1831216536; Occurrence Remarks: Palo Corona park, with advance permission;; Coordinate Uncertainty in Meters: 829.00000.

Occurrence Remarks:; Coordinate Uncertainty in Meters: 10.00000.

Occurrence Remarks: Bio20F; Coordinate Uncertainty in Meters: 4.00000.

Occurrence Remarks: Basking on the middle of the trail.

Santa Cruz, California: 37.027038, -122.037119: : 4/4/2026: Parsa Fard: 4 Apr 2026 ; Coordinate Uncertainty in Meters: 28447.00000.

Santa Cruz, California: 37.033731, -122.048733: : 3/24/2026: Joshua Deutsch: 24 Mar 2026 ; Coordinate Uncertainty in Meters: 0.11000.

Santa Cruz, California: 37.018375, -122.131775: : 4/19/2026: vsmith20: 19 Apr 2026 ; Coordinate Uncertainty in Meters: 9.00000.

Merced, California: 37.039406, -121.204712: : 4/27/2026: adamhichew: 27 Apr 2026 ; Coordinate Uncertainty in Meters: 11.00000.

Santa Cruz, California: 37.037308, -121.999887: : 11/12/2025: Adam Wachtel: 12 Nov 2025 ; Coordinate Uncertainty in Meters: 25.00000.

Santa Cruz, California: 37.0187, -122.059224: : 5/19/2026: bos__mutus: 19 May 2026 ; Coordinate Uncertainty in Meters: 156.00000.

Santa Cruz, California: 37.039094, -122.210161: : 5/21/2026: masonrcole: 21 May 2026 ; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: 2nd one of the day; Coordinate Uncertainty in Meters: 11.10000.

Santa Clara, California: 37.018907, -121.729336: : 12/15/2025: servatis16: 15 Dec 2025 ; Coordinate Uncertainty in Meters: 338.00000.

Santa Cruz, California: 37.033233, -122.049347: : 4/9/2026: Erik Lopez: 9 Apr 2026 ; Coordinate Uncertainty in Meters: 5.00000.

Santa Cruz, California: 37.036961, -121.875237: : 5/15/2025: senderomx: 15 May 2025 ; Coordinate Uncertainty in Meters: 5.00000.

Occurrence Remarks: Maybe a foot long if stretched out, and half an inch wide. Not running away when handled. Coils and moves a bit but not that much. Wondering if is injured.; Coordinate Uncertainty in Meters: 7.00000.

Santa Cruz, California: 36.991897, -121.987962: : 9/28/2025: Phoebe Barnes: 28 Sep 2025 ; Coordinate Uncertainty in Meters: 9.00000.

Santa Cruz, California: 37.023297, -121.801058: : 5/17/2026: Stephanie Lu: 17 May 2026 ; Coordinate Uncertainty in Meters: 0.11000.

Santa Clara, California: 37.007647, -121.689742: : 3/1/2026: Sudarshan Bhat: 1 Mar 2026 ; Coordinate Uncertainty in Meters: 62.00000.

Santa Cruz, California: 36.996704, -122.067101: : 4/7/2026: muddisadog: 7 Apr 2026 ; Coordinate Uncertainty in Meters: 0.11000.

Santa Cruz, California: 37.003003, -122.055572: : 10/8/2025: Skyla O.: 8 Oct 2025 ; Coordinate Uncertainty in Meters: 743.00000.

Santa Cruz, California: 37.000674, -122.180539: : 9/24/2025: calfirecap: 24 Sep 2025 ; Coordinate Uncertainty in Meters: 28447.00000.

Santa Cruz, California: 37.031853, -122.046966: : 12/11/2025: etekler: 11 Dec 2025 ; Coordinate Uncertainty in Meters: 808.00000.

Santa Cruz, California: 37.029218, -122.020344: : 7/23/2025: Parsa Fard: 23 Jul 2025 ; Coordinate Uncertainty in Meters: 28447.00000.

Santa Cruz, California: 37.025665, -122.006213: : 6/2/2026: herbiebond: 2 Jun 2026 ; Coordinate Uncertainty in Meters: 28447.00000.

Santa Clara, California: 37.004863, -121.685641: : 3/26/2026: kaitlyndickson: 26 Mar 2026 ; Coordinate Uncertainty in Meters: 10.00000.

GBIFID: 1038335550; Occurrence Remarks: Not a cooperative snake...;; Coordinate Uncertainty in Meters: 28447.00000.

GBIFID: 3858594572; Occurrence Remarks: snake with yellow stripe along back;; Coordinate Uncertainty in Meters: 10.00000.

GBIFID: 1850987207; Occurrence Remarks: In burn site by redwood stand found while weeding;; Coordinate Uncertainty in Meters: 22.00000.

Santa Cruz, California: 37.030418, -122.051272: : 9/21/2022: santacruzmountaingoat: 21 Sep 2022 :

GBIFID: 4102811646; Occurrence Remarks: One of several specimens observed from juveniles to gravid females. All observed basking on an overcast and mild day. One juvenile observed under board cover.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 4127436384; Occurrence Remarks: terrible photo. Seen on land and in a creek, yellow stripe down body and greenish-yellow belly;; Coordinate Uncertainty in Meters: 573.00000.

GBIFID: 4162415324; Occurrence Remarks: himb is a snekky snek <3;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 1143560928; Occurrence Remarks: YoY;; Coordinate Uncertainty in Meters: 28447.00000.

GBIFID: 910490928; Occurrence Remarks: One Juvenile and one sub-adult;; Coordinate Uncertainty in Meters: 28447.00000.

GBIFID: 4863498013; Occurrence Remarks: Juvenile, ~ 12 inches;; Coordinate Uncertainty in Meters: 28447.00000.

GBIFID: 5104732041; Occurrence Remarks: Seen basking in morning sun about 10ft from road ~11 inches long Weather: a warm sunny morning on the second hot day in a row, during the first few warm days of spring;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 5167362916; Occurrence Remarks: Land of Medicine Buddah;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 1272078728; Occurrence Remarks: next to log in shade. total length ~12inches;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 1305118900; Occurrence Remarks: Redwoods transitional chaparral, fire road, very active;; Coordinate Uncertainty in Meters: 1032.00000.

GBIFID: 2540906488; Occurrence Remarks: Young;; Coordinate Uncertainty in Meters: 750.00000.

GBIFID: 2574150234; Occurrence Remarks: Found in FERP;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 1457620496; Occurrence Remarks: Mixed evergreen forest, wet fire road edge, some chaparral nearby;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 1805368989; Occurrence Remarks: A little less than a foot long;; Coordinate Uncertainty in Meters: 10.00000.

GBIFID: 3018009814; Occurrence Remarks: Scanned from an old slide. Date is accurate; time is not. Location should be accurate, but imprecise.;; Coordinate Uncertainty in Meters: 30.00000.

GBIFID: 3090670913; Occurrence Remarks: Could be wrong on this one, not a herp guy. Seen hunting sticklebacks in tiny lagoon.;; Coordinate Uncertainty in Meters: 76.00000.

Occurrence Remarks:; Coordinate Uncertainty in Meters: 46.00000.

Occurrence Remarks: Just a lilΓÇÖ guy I spooked accidentally; Coordinate Uncertainty in Meters: 17.00000.

San Mateo, California: 37.099235, -122.334083: : 5/23/2024: herp_n_surf: 23 May 2024 ; Coordinate Uncertainty in Meters: 28447.00000.

Occurrence Remarks: Henry W Coe State Park; Coordinate Uncertainty in Meters: 7.00000.

Santa Cruz, California: 37.060255, -122.193717: : 4/4/2026: Parsa Fard: 4 Apr 2026 ; Coordinate Uncertainty in Meters: 28447.00000.

Santa Clara, California: 37.06976, -121.452038: : 4/16/2026: mattytut7: 16 Apr 2026 ; Coordinate Uncertainty in Meters: 57.00000.

Unknown, California: 37.079386, -122.398733: : 3/11/2026: Jake Scott: 11 Mar 2026 ; Coordinate Uncertainty in Meters: 28447.00000.

Santa Clara, California: 37.083527, -121.795238: : 4/17/2026: Katrina Mccollough: 17 Apr 2026 ; Coordinate Uncertainty in Meters: 40.00000.

Santa Cruz, California: 37.052844, -122.191223: : 5/25/2026: Grey Hayes: 25 May 2026 ; Coordinate Uncertainty in Meters: 9.00000.

Santa Clara, California: 37.12872, -121.482772: : 5/24/2026: Abe Doherty: 24 May 2026 ; Coordinate Uncertainty in Meters: 14.00000.

Santa Clara, California: 37.128667, -121.482658: : 5/24/2026: Abe Doherty: 24 May 2026 ; Coordinate Uncertainty in Meters: 10.00000.

Santa Clara, California: 37.081368, -121.789196: : 2/26/2026: eebert_inaturalist: 26 Feb 2026 ; Coordinate Uncertainty in Meters: 4.00000.

Occurrence Remarks: bioe20f; Coordinate Uncertainty in Meters: 13.00000.

Occurrence Remarks: Could be a Diablo Range Garter? Thamnophis atratus zaxanthus; Coordinate Uncertainty in Meters: 0.11000.

Santa Clara, California: 37.059197, -121.651588: : 2/4/2026: wildlifeeve: 4 Feb 2026 ; Coordinate Uncertainty in Meters: 28447.00000.

Santa Clara, California: 37.085678, -121.79477: : 9/27/2025: joescience1: 27 Sep 2025 ; Coordinate Uncertainty in Meters: 40.00000.

Santa Clara, California: 37.131437, -121.314846: : 3/15/2026: Alexander Harman, Ph. D.: 15 Mar 2026 ; Coordinate Uncertainty in Meters: 28447.00000.

Occurrence Remarks: Thamnophis atratus x zaxanthus; Coordinate Uncertainty in Meters: 28447.00000.

San Mateo, California: 37.072917, -122.308907: : 10/28/2018: Zach Lim: 28 Oct 2018 ; Coordinate Uncertainty in Meters: 28447.00000.

Santa Clara, California: 37.081997, -121.799338: : 10/30/2025: yahootaboot: 30 Oct 2025 ; Coordinate Uncertainty in Meters: 145.00000.

Santa Cruz, California: 37.107853, -122.18715: : 7/14/2025: calfirecap: 14 Jul 2025 ; Coordinate Uncertainty in Meters: 28447.00000.

Santa Clara, California: 37.130264, -121.373733: : 6/9/2026: Abe Doherty: 9 Jun 2026 ; Coordinate Uncertainty in Meters: 6.00000.

Santa Cruz, California: 37.113586, -122.137703: : 12/7/2025: Angela Smith: 7 Dec 2025 ; Coordinate Uncertainty in Meters: 15.00000.

GBIFID: 3455711573; Occurrence Remarks: Quail Hollow Ranch;; Coordinate Uncertainty in Meters: 502.00000.

GBIFID: 3743109786; Occurrence Remarks: Obsevation coordinates obscured at the request of the survey leader;; Coordinate Uncertainty in Meters: 28447.00000.

GBIFID: 3773252881; Occurrence Remarks: Deceased.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 1841331473; Occurrence Remarks: A bit late on this one...;; Coordinate Uncertainty in Meters: 22.00000.

GBIFID: 1847599097; Occurrence Remarks: The snake quickly escaped down a burrow-hole, but it left its freshly molted skin behind.;; Coordinate Uncertainty in Meters: 31.00000.

GBIFID: 1088937032; Occurrence Remarks: Is it trying to swallow a California Giant Salamander or maybe a Santa Cruz black salamander ?;; Coordinate Uncertainty in Meters: 28447.00000.

GBIFID: 1880555671; Occurrence Remarks: Off Swanton Road, permit needed for private property;; Coordinate Uncertainty in Meters: 969.00000.

GBIFID: 2860183301; Occurrence Remarks: Aquatic Gartersnake (Thamnophis atratus), Uvas Canyon County Park, Santa Clara County, California - 4 June 2015.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 4172179591; Occurrence Remarks: Just the tail left from a recent predatory event.;; Coordinate Uncertainty in Meters: 401.00000.

GBIFID: 4440965005; Occurrence Remarks: Exact location forgotten;; Coordinate Uncertainty in Meters: 9333.00000.

GBIFID: 4607610917; Occurrence Remarks: I would think Thamnophis elegans ssp. terrestris due to the lack of red, but iNaturalist insists that its Thamnophis sirtalis. T. elegans is not unknown in Coe, e.g. https://www.inaturalist.org/observations/10958259;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 4901678604; Occurrence Remarks: Black snake with yellow stripes. Short body.;; Coordinate Uncertainty in Meters: 1032.00000.

GBIFID: 2540726756; Occurrence Remarks: We saw a small snake green with yellow stripe about 20 inches long, along the path at Quail Hollow Ranch in the Santa Cruz mountains. Very pretty & docile.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 4908230117; Occurrence Remarks: T. atratus?;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 2238799742; Occurrence Remarks: T.atratus ?;; Coordinate Uncertainty in Meters: 28447.00000.

GBIFID: 4945983377; Occurrence Remarks: see yellow stripe in the center, unfortunately snake was slithering away.;; Coordinate Uncertainty in Meters: 240.00000.

GBIFID: 5133702820; Occurrence Remarks: found sunbathing on some rocks in the trail;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 2429597560; Occurrence Remarks: first noticed floating down the creek, looking like a long, curled dead leaf, suddenly this snake took off swimming toward the bank and struck out, catching a small frog. we watched as the snake digested the frog. right after i took this photo, the snake puffed out the sides of the head and the head became very triangular. then snake swam away and hid beneath a rock a couple of feet below the surface of the water;; Coordinate Uncertainty in Meters: 8.00000.

GBIFID: 891719208; Occurrence Remarks: Observed with Sullivanribbit.;; Coordinate Uncertainty in Meters: 28447.00000.

GBIFID: 1586917288; Occurrence Remarks: My first snake of the New Year!;; Coordinate Uncertainty in Meters: 11.10000.

GBIFID: 1572334123; Occurrence Remarks: well fed garter snake;; Coordinate Uncertainty in Meters: 177.00000.

GBIFID: 1586920782; Occurrence Remarks: The upper labials and the shape of the eye identify this as an atratus.;; Coordinate Uncertainty in Meters: 1330.00000.

GBIFID: 891077856; Occurrence Remarks: Internasals and upper labials ID this snake as atratus.;; Coordinate Uncertainty in Meters: 1330.00000.

GBIFID: 3302462127; Occurrence Remarks: very small;; Coordinate Uncertainty in Meters: 2.00000.

GBIFID: 3335351596; Occurrence Remarks: Poor photo quality, but ya girl is not entering poison oak for no snake.;; Coordinate Uncertainty in Meters: 43.00000.

GBIFID: 3385088988; Occurrence Remarks: Respite in reptiles! This little guy was fast.;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 1807292029; Occurrence Remarks: Most garter snakes seen along the old highway are this species, but there are two other species occasionally encountered- T. elegans and T. sirtalis.;; Coordinate Uncertainty in Meters: 8.00000.

Santa Clara, California: 37.081764, -121.793497: : 8/31/2025: Pat P: 31 Aug 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Santa Cruz, California: 37.044995, -122.243778: : 4/7/2025: Parsa Fard: 7 Apr 2025 ; Coordinate Uncertainty in Meters: 28447.00000.

Santa Clara, California: 37.083981, -121.795845: : 6/21/2026: coneja8: 21 Jun 2026 ; Coordinate Uncertainty in Meters: 10.00000.

San Mateo, California: 37.117328, -122.330887: : 8/6/2025: daniela4167: 6 Aug 2025 ; Coordinate Uncertainty in Meters: 4.00000.

Santa Cruz, California: 37.095642, -121.991189: : 7/13/2026: gmattos17: 13 Jul 2026 ; Coordinate Uncertainty in Meters: 20.00000.

Santa Cruz, California: 37.043633, -122.07885: : 9/15/2025: flyingcloud: 15 Sep 2025 ; Coordinate Uncertainty in Meters: 34.00000.

Santa Clara, California: 37.397664, -121.797467: : 2/8/2026: Moses Alvarez: 8 Feb 2026 ; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 1038335081; Occurrence Remarks: Im thinking this one just shed? So shiny, and its belly color is fantastic -- almost like copper patina.;; Coordinate Uncertainty in Meters: 0.11000.

San Mateo, California: 37.218508, -122.320367: : 10/24/2025: deerweed_dude: 24 Oct 2025 ; Coordinate Uncertainty in Meters: 7.00000.

Santa Clara, California: 37.345767, -122.15579: : 10/26/2025: vgivanovic: 26 Oct 2025 ; Coordinate Uncertainty in Meters: 9.00000.

Santa Cruz, California: 37.161598, -122.016826: : 10/17/2025: dietel: 17 Oct 2025 ; Coordinate Uncertainty in Meters: 31.00000.

Santa Clara, California: 37.349523, -122.110532: : 11/23/2025: Adam Aslam: 23 Nov 2025 ; Coordinate Uncertainty in Meters: 28417.00000.

San Mateo, California: 37.2786, -122.199547: : 7/31/2024: Annette Herz: 31 Jul 2024 ; Coordinate Uncertainty in Meters: 5.00000.

Santa Clara, California: 37.181703, -121.50688: : 3/14/2026: taylormcintire: 14 Mar 2026 ; Coordinate Uncertainty in Meters: 93.00000.

San Mateo, California: 37.249803, -122.218703: : 11/2/2025: unitybees: 2 Nov 2025 ; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 4126936228; Occurrence Remarks: This snake went into the water after a tadpole. My exposures were all off and this is the only somewhat useful shot I got.;; Coordinate Uncertainty in Meters: 0.11000.

Santa Clara, California: 37.206825, -121.458268: : 4/8/2026: John Kenny: 8 Apr 2026 ; Coordinate Uncertainty in Meters: 0.11000.

Santa Cruz, California: 37.173093, -122.224294: : 5/10/2026: Fredrick Larabee: 10 May 2026 ; Coordinate Uncertainty in Meters: 2.00000.

San Mateo, California: 37.411555, -122.306747: : 5/30/2026: heavyj: 30 May 2026 ; Coordinate Uncertainty in Meters: 4.00000.

Santa Clara, California: 37.158749, -121.707938: : 4/6/2026: Parsa Fard: 6 Apr 2026 ; Coordinate Uncertainty in Meters: 28447.00000.

Santa Clara, California: 37.147514, -121.796067: : 5/6/2026: nosillaronnoc: 6 May 2026 ; Coordinate Uncertainty in Meters: 4.00000.

San Mateo, California: 37.217188, -122.310325: : 5/8/2026: Jean Koch: 8 May 2026 ; Coordinate Uncertainty in Meters: 16.00000.

Santa Cruz, California: 37.187099, -122.151773: : 5/23/2026: Mei Li P.: 23 May 2026 ; Coordinate Uncertainty in Meters: 28447.00000.

Santa Clara, California: 37.213453, -121.427794: : 5/24/2026: ltaranta: 24 May 2026 ; Coordinate Uncertainty in Meters: 0.11000.

Santa Clara, California: 37.1872, -121.54532: : 5/23/2026: abbyness101: 23 May 2026 ; Coordinate Uncertainty in Meters: 4.00000.

Santa Clara, California: 37.38987, -121.732895: : 5/31/2026: Nick Ramirez: 31 May 2026 ; Coordinate Uncertainty in Meters: 78.00000.

San Mateo, California: 37.232791, -122.175011: : 2/27/2026: grehanburns: 27 Feb 2026 ; Coordinate Uncertainty in Meters: 28417.00000.

Santa Clara, California: 37.337878, -122.123722: : 2/27/2026: Lew Kurtz: 27 Feb 2026 ; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: At the edge of a cattle pond.; Coordinate Uncertainty in Meters: 31.00000.

Santa Cruz, California: 37.159737, -122.173444: : 3/15/2026: James Maughn: 15 Mar 2026 ; Coordinate Uncertainty in Meters: 28447.00000.

Stanislaus, California: 37.23642, -121.270998: : 5/1/2026: pskolar: 1 May 2026 ; Coordinate Uncertainty in Meters: 28417.00000.

Stanislaus, California: 37.287599, -121.373668: : 5/1/2026: jpgalvan: 1 May 2026 ; Coordinate Uncertainty in Meters: 28417.00000.

Santa Clara, California: 37.14749, -121.79601: : 5/6/2026: gdrbirder: 6 May 2026 ; Coordinate Uncertainty in Meters: 1.11000.

Occurrence Remarks: this observation is part of an ongoing study documenting the newt roadkill problem around Lexington Reservoir. Please join us - send me a message if youre interested, or click here to find out more - https://www.bioblitz.club/newts; Coordinate Uncertainty in Meters: 5.00000.

Santa Clara, California: 37.337699, -122.025554: : 1/14/2026: Adam Aslam: 14 Jan 2026 ; Coordinate Uncertainty in Meters: 28417.00000.

Santa Clara, California: 37.39758, -121.797317: : 2/8/2026: myapapaya: 8 Feb 2026 ; Coordinate Uncertainty in Meters: 32.00000.

Santa Cruz, California: 37.230839, -122.096512: : 4/15/2026: Sheldon Logan: 15 Apr 2026 ; Coordinate Uncertainty in Meters: 49.00000.

Santa Cruz, California: 37.179258, -122.089229: : 3/21/2026: David Pierce: 21 Mar 2026 ; Coordinate Uncertainty in Meters: 59907.00000.

San Mateo, California: 37.265647, -122.209053: : 5/25/2025: Josh Walker: 25 May 2025 ; Coordinate Uncertainty in Meters: 4.00000.

Occurrence Remarks: Roadkill. Confusing because I see legs, but that may be a newt or salamander?; Coordinate Uncertainty in Meters: 0.11000.

Santa Clara, California: 37.147492, -121.796014: : 5/6/2026: Gina Genduso: 6 May 2026 ; Coordinate Uncertainty in Meters: 5.00000.

San Mateo, California: 37.345867, -122.241837: : 5/11/2026: Christin New: 11 May 2026 ; Coordinate Uncertainty in Meters: 4.00000.

San Mateo, California: 37.395358, -122.273336: : 5/11/2026: Donald L Packwood: 11 May 2026 ; Coordinate Uncertainty in Meters: 88.00000.

San Mateo, California: 37.345908, -122.242158: : 5/14/2026: Christin New: 14 May 2026 ; Coordinate Uncertainty in Meters: 4.00000.

Santa Clara, California: 37.337906, -122.117653: : 3/17/2026: Lew Kurtz: 17 Mar 2026 ; Coordinate Uncertainty in Meters: 1.00000.

Santa Clara, California: 37.239647, -122.070555: : 3/19/2026: John Scharpen: 19 Mar 2026 ; Coordinate Uncertainty in Meters: 135.00000.

San Mateo, California: 37.196965, -122.293808: : 3/21/2026: jtolchin: 21 Mar 2026 ; Coordinate Uncertainty in Meters: 502.00000.

Santa Cruz, California: 37.154772, -122.234817: : 3/24/2026: F. Van Meter: 24 Mar 2026 ; Coordinate Uncertainty in Meters: 168739.00000.

Santa Clara, California: 37.140885, -121.786764: : 3/31/2026: servatis16: 31 Mar 2026 ; Coordinate Uncertainty in Meters: 28447.00000.

Santa Clara, California: 37.233178, -122.058067: : 4/9/2026: John Scharpen: 9 Apr 2026 ; Coordinate Uncertainty in Meters: 4.00000.

San Mateo, California: 37.290302, -122.193841: : 3/19/2026: Parsa Fard: 19 Mar 2026 ; Coordinate Uncertainty in Meters: 28417.00000.

Santa Cruz, California: 37.220908, -122.146957: : 11/2/2025: Parsa Fard: 2 Nov 2025 ; Coordinate Uncertainty in Meters: 28417.00000.

San Mateo, California: 37.432229, -122.334664: : 7/10/2025: susandn: 10 Jul 2025 ; Coordinate Uncertainty in Meters: 19.00000.

Santa Cruz, California: 37.190568, -122.165511: : 6/2/2026: shroomsday: 2 Jun 2026 ; Coordinate Uncertainty in Meters: 10.00000.

Santa Clara, California: 37.213594, -121.532786: : 7/6/2026: babydynamite: 6 Jul 2026 ; Coordinate Uncertainty in Meters: 4.00000.

Occurrence Remarks: During Herp survey; Coordinate Uncertainty in Meters: 10.00000.

Santa Cruz, California: 37.173547, -122.22362: : 5/17/2025: Guillermo Roque: 17 May 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Santa Cruz, California: 37.22837, -122.11065: : 6/14/2026: lie-lie: 14 Jun 2026 ; Coordinate Uncertainty in Meters: 2.00000.

Santa Clara, California: 37.183737, -122.008531: : 6/15/2026: Adam Huggins: 15 Jun 2026 ; Coordinate Uncertainty in Meters: 18.00000.

Occurrence Remarks: Portola Redwoods State Park, San Mateo County, California; Coordinate Uncertainty in Meters: 278.00000.

Santa Cruz, California: 37.17082, -122.118844: : 6/21/2026: Zoe G: 21 Jun 2026 ; Coordinate Uncertainty in Meters: 4.00000.

Santa Cruz, California: 37.176385, -122.063059: : 6/21/2026: yichen_g: 21 Jun 2026 ; Coordinate Uncertainty in Meters: 28447.00000.

Santa Clara, California: 37.238553, -122.070825: : 6/22/2026: John Scharpen: 22 Jun 2026 ; Coordinate Uncertainty in Meters: 23.00000.

Santa Clara, California: 37.153519, -121.591721: : 3/29/2026: nicolemcp28: 29 Mar 2026 ; Coordinate Uncertainty in Meters: 0.11000.

San Mateo, California: 37.173092, -122.377842: : 6/14/2025: nlimon: 14 Jun 2025 ; Coordinate Uncertainty in Meters: 28447.00000.

GBIFID: 1038335018; Occurrence Remarks: Tony Iwane and I were well on our way today in breaking the Snake Jinx we had going. This beauty had a shade of blue/grey/slate black on its belly that...was a color I dont think Id ever seen...and I friggin PAINT for a living!;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 3705505221; Occurrence Remarks: This observation is part of an ongoing study of the Pacific newt roadkills on Alma Bridge Road, Lexington Reservoir. See our project page for more info: Coordinate Uncertainty in Meters: 0.11000.

Santa Cruz, California: 37.25188, -122.122156: : 4/8/2022: Jeremiah Degenhardt: 8 Apr 2022 :

GBIFID: 3759972359; Occurrence Remarks: @chilipossum;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 1898781562; Occurrence Remarks: Coiled in the tall grass in a narrow spot between a use trail and a Frog Lake.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 3772489637; Occurrence Remarks: You can see a bulge in its belly from a recent meal.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 3784831426; Occurrence Remarks: Swam away from the shore and into the reeds when I approached.;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 3785037438; Occurrence Remarks: was foraging at the edge of the pond;; Coordinate Uncertainty in Meters: 8.00000.

GBIFID: 1880502701; Occurrence Remarks: Dead on the trail. Partially dessicated. Several pronounced lumps along its body. Length: ~15.5 (Limekiln Trail);; Coordinate Uncertainty in Meters: 1.11000.

GBIFID: 3915512597; Occurrence Remarks: Santa Cruz Garter Snake, Thamnophis atratus atratus;; Coordinate Uncertainty in Meters: 31.00000.

GBIFID: 1898785338; Occurrence Remarks: Candidate choices based on californiaherps.com range maps. Other species eliminated based on coloration (e.g. no red spots observed).;; Coordinate Uncertainty in Meters: 769.00000.

GBIFID: 3966558208; Occurrence Remarks: Juvenile;; Coordinate Uncertainty in Meters: 28447.00000.

GBIFID: 4129776679; Occurrence Remarks: Adult male, handled by permitted biologist.;; Coordinate Uncertainty in Meters: 28417.00000.

GBIFID: 4407332775; Occurrence Remarks: I found this shed skin under a concrete block. IΓÇÖve seen racers in my yard more often than garter or gopher snakes.;; Coordinate Uncertainty in Meters: 13.00000.

GBIFID: 4516603663; Occurrence Remarks: La Honda;; Coordinate Uncertainty in Meters: 28417.00000.

GBIFID: 4519222006; Occurrence Remarks: Found deceased;; Coordinate Uncertainty in Meters: 28417.00000.

GBIFID: 1990613249; Occurrence Remarks: Garter Snake (roadkill) Found dead on Alma Bridge Rd.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 3399083308; Occurrence Remarks: In dry lake bed. Two juvenile individuals observed, one with a yellow ventral region and one with cream. Note the difference in the length of the posterior and anterior chin scales that form an X. In T. elegans, the scales are of equal length.;; Coordinate Uncertainty in Meters: 13512.00000.

GBIFID: 4852327597; Occurrence Remarks: Lovely, large, in the vicinity of a creek;; Coordinate Uncertainty in Meters: 0.11000.

San Mateo, California: 37.345992, -122.241753: : 3/22/2026: Christin New: 22 Mar 2026 ; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 2235549089; Occurrence Remarks: Basking up bank from an ephemeral stream.;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 2237465449; Occurrence Remarks: gartersnake eating a fish;; Coordinate Uncertainty in Meters: 163.00000.

GBIFID: 1211999631; Occurrence Remarks: TomV thought this was a garter snake Under a log;; Coordinate Uncertainty in Meters: 86.00000.

GBIFID: 4935944959; Occurrence Remarks: Nice blue one;; Coordinate Uncertainty in Meters: 51.00000.

GBIFID: 4945778438; Occurrence Remarks: First atratus in a while!;; Coordinate Uncertainty in Meters: 28417.00000.

Santa Cruz, California: 37.235863, -122.118818: : 3/21/2026: columbidaeperson: 21 Mar 2026 ; Coordinate Uncertainty in Meters: 15.00000.

GBIFID: 4949871857; Occurrence Remarks: Found my target species for the day but in one of the most depressing ways possible. This guy was borderline starved to death. Poor guy was in horrible condition.;; Coordinate Uncertainty in Meters: 28417.00000.

GBIFID: 2242911468; Occurrence Remarks: Little Garter got quite shirty with me when I impertinently suggested the middle of the trail was no place to bask.;; Coordinate Uncertainty in Meters: 31.00000.

GBIFID: 4978253935; Occurrence Remarks: Found near the pond.;; Coordinate Uncertainty in Meters: 1.11000.

GBIFID: 4978642061; Occurrence Remarks: Shedding;; Coordinate Uncertainty in Meters: 28417.00000.

GBIFID: 4980610965; Occurrence Remarks: Road-killed along Hwy 1.;; Coordinate Uncertainty in Meters: 15.00000.

GBIFID: 5134352627; Occurrence Remarks: Beautiful animal. And didnt poop on me. ;);; Coordinate Uncertainty in Meters: 28417.00000.

GBIFID: 5141002373; Occurrence Remarks: Some Garter Snake anyway. I saw two yesterday!;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 1262379752; Occurrence Remarks: A different individual, not devouring a frog at the time of the photo.;; Coordinate Uncertainty in Meters: 28447.00000.

GBIFID: 5176981733; Occurrence Remarks: Roadkill;; Coordinate Uncertainty in Meters: 13.00000.

GBIFID: 2429575952; Occurrence Remarks: Two snakes;; Coordinate Uncertainty in Meters: 52.00000.

GBIFID: 891720001; Occurrence Remarks: Fat and happy.;; Coordinate Uncertainty in Meters: 3660.00000.

GBIFID: 2549996292; Occurrence Remarks: Juvenile. Seen during newt roadkill monitoring project.;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 2988610425; Occurrence Remarks: This observation is part of an on going study of the Pacific newt roadkills on Alma Bridge Rd, Lexington Reservoir. See our project page for more info;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 2580089574; Occurrence Remarks: Old photos, originals now lost, taken from the San Mateo County Birding Guide;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 2603475437; Occurrence Remarks: About 24ΓÇ¥ long with light green belly.;; Coordinate Uncertainty in Meters: 7412.00000.

GBIFID: 2626123661; Occurrence Remarks: Found in the road, deceased.;; Coordinate Uncertainty in Meters: 16829.00000.

GBIFID: 2626629953; Occurrence Remarks: I believe there is a ick on the snakes mouth.;; Coordinate Uncertainty in Meters: 15.00000.

GBIFID: 2573818606; Occurrence Remarks: Eating a chorus frog;; Coordinate Uncertainty in Meters: 28417.00000.

GBIFID: 1500265618; Occurrence Remarks: 3032;; Coordinate Uncertainty in Meters: 191.00000.

GBIFID: 899954099; Occurrence Remarks: I added a full body shot of the snake;; Coordinate Uncertainty in Meters: 2254.00000.

GBIFID: 2862565687; Occurrence Remarks: Despite looking grey green in these pics, It had a distinct blue cast contrasting with the yellow stripe.;; Coordinate Uncertainty in Meters: 500.00000.

GBIFID: 2999157034; Occurrence Remarks: The garter snake is one of the most frequently encountered snakes. Non-venomous and otherwise harmless they are important members of the ecosystem.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 3112709526; Occurrence Remarks: Garter snake? Sanborn;; Coordinate Uncertainty in Meters: 578.00000.

GBIFID: 3112546572; Occurrence Remarks: (Manzanita Trail to the pond);; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 3113658848; Occurrence Remarks: Near Smith Creek;; Coordinate Uncertainty in Meters: 8.00000.

GBIFID: 3124831258; Occurrence Remarks: garter snake?;; Coordinate Uncertainty in Meters: 8.00000.

GBIFID: 3124866928; Occurrence Remarks: This guy just ate a big butterfly. (Manzanita Trail);; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 3124862390; Occurrence Remarks: This snake was slithering in the grass before entering the pond. It was smaller than the previous snake that had just eaten a meal. (Manzanita Trail);; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 1024206893; Occurrence Remarks: Found near creek by redwoods .;; Coordinate Uncertainty in Meters: 12584.00000.

GBIFID: 3343746850; Occurrence Remarks: Alameda County , California . At least 4 individuals seen .;; Coordinate Uncertainty in Meters: 28388.00000.

GBIFID: 3343768099; Occurrence Remarks: No water anywhere near the place I found it. It was crossing the trail upwards the slope and acted very defensively.;; Coordinate Uncertainty in Meters: 13.00000.

GBIFID: 3355139484; Occurrence Remarks: Santa Cruz Garter Snake - could be a California Striped Racer, but the yellow stripe on top of the head suggests the former;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 3355399451; Occurrence Remarks: approximate location;; Coordinate Uncertainty in Meters: 61.00000.

GBIFID: 1898847855; Occurrence Remarks: Narrowed down to coast or santa cruz gartersnake based on range and color. I chose between them using upper labial and internasal details as given in the key here: Coordinate Uncertainty in Meters: 57.00000.

Santa Cruz, California: 37.170869, -122.161877: : 3/22/2026: James Maughn: 22 Mar 2026 ; Coordinate Uncertainty in Meters: 28447.00000.

Santa Cruz, California: 37.159398, -122.284242: : 8/14/2025: Parsa Fard: 14 Aug 2025 ; Coordinate Uncertainty in Meters: 28447.00000.

Occurrence Remarks: Found 12 snakes within about half a mile of each other; Coordinate Uncertainty in Meters: 4.00000.

Santa Clara, California: 37.398838, -121.822243: : 8/25/2025: Keith Wandry: 25 Aug 2025 ; Coordinate Uncertainty in Meters: 942.00000.

Santa Clara, California: 37.178172, -122.002129: : 8/30/2025: dinoblaze: 30 Aug 2025 ; Coordinate Uncertainty in Meters: 566.00000.

San Mateo, California: 37.290395, -122.1669: : 9/6/2025: Taylor Shih: 6 Sep 2025 ; Coordinate Uncertainty in Meters: 54.00000.

Santa Clara, California: 37.311947, -122.139799: : 9/19/2025: Parsa Fard: 19 Sep 2025 ; Coordinate Uncertainty in Meters: 28417.00000.

San Mateo, California: 37.288358, -122.161089: : 9/15/2025: Felicia Gershberg: 15 Sep 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: Occurrence Remarks: My first orange atratus; Coordinate Uncertainty in Meters: 28329.00000.

Alameda, California: 37.636462, -121.91313: : 3/26/2026: sfeagle: 26 Mar 2026 ; Coordinate Uncertainty in Meters: 4.00000.

San Mateo, California: 37.567821, -122.5088: : 10/26/2025: josephalbertelli: 26 Oct 2025 ; Coordinate Uncertainty in Meters: 198.00000.

Contra Costa, California: 37.836995, -122.046897: : 10/18/2025: jrangelle: 18 Oct 2025 ; Coordinate Uncertainty in Meters: 14.00000.

Solano, California: 38.242831, -122.139945: : 8/24/2025: capaka: 24 Aug 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Contra Costa, California: 37.89814, -121.94613: : 11/12/2025: Dan Fitzgerald (Fitz): 12 Nov 2025 ; Coordinate Uncertainty in Meters: 5.00000.

Napa, California: 38.54443, -122.54062: : 9/27/2025: cypripedium18: 27 Sep 2025 ; Coordinate Uncertainty in Meters: 4.00000.

Sonoma, California: 38.393537, -122.887597: : 11/7/2025: brock: 7 Nov 2025 ; Coordinate Uncertainty in Meters: 4.00000.

San Mateo, California: 37.476623, -122.517037: : 8/26/2024: otavas: 26 Aug 2024 ; Coordinate Uncertainty in Meters: 28388.00000.

Mendocino, California: 39.352239, -123.825689: : 8/10/2024: rowena-k: 10 Aug 2024 ; Coordinate Uncertainty in Meters: 31.00000.

Alameda, California: 37.636458, -121.913108: : 8/6/2025: james-vg: 6 Aug 2025 ; Coordinate Uncertainty in Meters: 14.00000.

Contra Costa, California: 37.84067, -122.122905: : 9/13/2025: godzig: 13 Sep 2025 ; Coordinate Uncertainty in Meters: 3.00000.

Marin, California: 37.916905, -122.590592: : 9/14/2025: Inaya Nicholls: 14 Sep 2025 ; Coordinate Uncertainty in Meters: 14.00000.

Marin, California: 38.174478, -122.814247: : 10/4/2025: erinenfield: 4 Oct 2025 ; Coordinate Uncertainty in Meters: 13.00000.

GBIFID: 3466338006; Occurrence Remarks: Side stripe was very light green, with no red pigment;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 4126778240; Occurrence Remarks: Unfortunately a bike rode over the snake and, while it was alive when the photo was taken, it is no longer among the living.;; Coordinate Uncertainty in Meters: 4.00000.

San Mateo, California: 37.443016, -122.484897: : 3/20/2025: Parsa Fard: 20 Mar 2025 ; Coordinate Uncertainty in Meters: 28388.00000.

San Mateo, California: 37.557819, -122.53684: : 3/20/2025: Parsa Fard: 20 Mar 2025 ; Coordinate Uncertainty in Meters: 28388.00000.

Alameda, California: 37.520811, -121.701817: : 4/4/2026: Stanley: 4 Apr 2026 ; Coordinate Uncertainty in Meters: 25.00000.

Lake, California: 38.774972, -122.700027: : 5/21/2026: thewildpearl: 21 May 2026 ; Coordinate Uncertainty in Meters: 12.00000.

Contra Costa, California: 37.823545, -121.786301: : 5/24/2026: Henry Fabian: 24 May 2026 ; Coordinate Uncertainty in Meters: 61.00000.

Contra Costa, California: 37.823664, -121.78651: : 5/24/2026: Henry Fabian: 24 May 2026 ; Coordinate Uncertainty in Meters: 61.00000.

Sonoma, California: 38.580939, -123.081367: : 5/5/2026: Laine McTague: 5 May 2026 ; Coordinate Uncertainty in Meters: 28240.00000.

Santa Clara, California: 37.436861, -121.899965: : 5/30/2026: Rayyan Syed Ibrahim: 30 May 2026 ; Coordinate Uncertainty in Meters: 28388.00000.

Sonoma, California: 38.42738, -123.115692: : 5/17/2026: areit: 17 May 2026 ; Coordinate Uncertainty in Meters: 4.00000.

Contra Costa, California: 37.948231, -122.151506: : 2/28/2026: Simon Scarpetta: 28 Feb 2026 ; Coordinate Uncertainty in Meters: 3.00000.

Occurrence Remarks: A medium-sized (about 2 feet in length) Garter Snake that I spotted and caught in a creek while it was apparently hunting Yellow-legged Frogs. The unnamed creek flows into Lake Berryessa. A friend had brought his two boys up for the day, and they instantly became young herpers. We released the snake back into the creek after a brief discussion about carefully handling it and taking some photos. Private Property - No Public Access.; Coordinate Uncertainty in Meters: 28210.00000.

San Mateo, California: 37.469736, -122.310625: : 4/19/2026: Theodore Thomas: 19 Apr 2026 ; Coordinate Uncertainty in Meters: 228.00000.

Alameda, California: 37.779453, -122.135017: : 4/24/2026: ladycartoonist: 24 Apr 2026 ; Coordinate Uncertainty in Meters: 8.00000.

Occurrence Remarks: I still go back and forth with these guys at Stebbins.; Coordinate Uncertainty in Meters: 28240.00000.

Occurrence Remarks: There were a LOT of these snakes among the rocks. I think we saw at least a dozen, from tiny ones maybe a foot long to larger ones around three feet long. One pair approached each other, investigated for a few moments, and went their separate ways. Another spot had several intertwined around one another.; Coordinate Uncertainty in Meters: 28329.00000.

Contra Costa, California: 37.86757, -121.98714: : 4/26/2026: Dan Fitzgerald (Fitz): 26 Apr 2026 ; Coordinate Uncertainty in Meters: 5.00000.

San Mateo, California: 37.449907, -122.395557: : 11/2/2025: Mary Hadik-Barkoczy: 2 Nov 2025 ; Coordinate Uncertainty in Meters: 9.00000.

San Mateo, California: 37.444572, -122.294037: : 10/27/2025: cultivar: 27 Oct 2025 ; Coordinate Uncertainty in Meters: 4.00000.

Sonoma, California: 38.409759, -122.817761: : 3/21/2026: Clayton Rucker: 21 Mar 2026 ; Coordinate Uncertainty in Meters: 3.00000.

Yolo, California: 38.898872, -122.3145: : 3/13/2026: Kurt Fischer: 13 Mar 2026 ; Coordinate Uncertainty in Meters: 4.00000.

Mendocino, California: 39.741107, -123.633609: : 5/7/2026: tylertutak: 7 May 2026 ; Coordinate Uncertainty in Meters: 30.00000.

Mendocino, California: 39.741222, -123.633447: : 5/7/2026: tylertutak: 7 May 2026 ; Coordinate Uncertainty in Meters: 0.11000.

Marin, California: 38.061949, -122.833974: : 5/22/2026: Yinpeng Zhang: 22 May 2026 ; Coordinate Uncertainty in Meters: 28300.00000.

Mendocino, California: 39.732833, -123.631419: : 5/16/2026: Arachnid Avery: 16 May 2026 ; Coordinate Uncertainty in Meters: 43.00000.

Contra Costa, California: 37.884417, -122.003869: : 5/31/2026: Debra Feammelli: 31 May 2026 ; Coordinate Uncertainty in Meters: 61.00000.

Marin, California: 38.021464, -122.749657: : 4/14/2026: Siena Merk: 14 Apr 2026 ; Coordinate Uncertainty in Meters: 3897.00000.

GBIFID: 1914200926; Occurrence Remarks: discovered injured on a gravel driveway - probably from being stepped on. poor thing - maybe just hours old;; Coordinate Uncertainty in Meters: 1.11000.

GBIFID: 4111906082; Occurrence Remarks: garter snake;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 3398712306; Occurrence Remarks: Sunning on road.;; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: Handled under EBRPD survey; Coordinate Uncertainty in Meters: 28388.00000.

Sonoma, California: 38.445446, -122.50958: : 4/5/2025: Shane S: 5 Apr 2025 ; Coordinate Uncertainty in Meters: 0.11000.

San Mateo, California: 37.572231, -122.473831: : 6/1/2025: winshoe: 1 Jun 2025 ; Coordinate Uncertainty in Meters: 95.00000.

Sonoma, California: 38.619912, -122.829042: : 8/25/2025: Katherine Laffan: 25 Aug 2025 ; Coordinate Uncertainty in Meters: 6.00000.

Solano, California: 38.185173, -122.210773: : 2/2/2026: Joe M: 2 Feb 2026 ; Coordinate Uncertainty in Meters: 0.11000.

Marin, California: 38.030167, -122.737495: : 2/6/2026: Rachel: 6 Feb 2026 ; Coordinate Uncertainty in Meters: 4.00000.

San Mateo, California: 37.62355, -122.463989: : 2/11/2026: Lindsey Gaul: 11 Feb 2026 ; Coordinate Uncertainty in Meters: 12.00000.

Mendocino, California: 39.898384, -123.752428: : 6/7/2025: Sheldon Schultz: 7 Jun 2025 ; Coordinate Uncertainty in Meters: 2.00000.

Alameda, California: 37.501512, -121.786933: : 2/26/2026: Cat Chang: 26 Feb 2026 ; Coordinate Uncertainty in Meters: 196.00000.

Marin, California: 37.969819, -122.730439: : 2/28/2026: Cypress Hansen: 28 Feb 2026 ; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: First snake of the day. Yay!! Found in talus slope on the side of the road.; Coordinate Uncertainty in Meters: 28240.00000.

Contra Costa, California: 37.928097, -122.153136: : 3/1/2026: gracied444: 1 Mar 2026 ; Coordinate Uncertainty in Meters: 5.00000.

Alameda, California: 37.783564, -122.140698: : 3/4/2026: Harrison Reber: 4 Mar 2026 ; Coordinate Uncertainty in Meters: 9.00000.

Contra Costa, California: 37.767702, -121.971695: : 3/5/2026: aloo-the-poet: 5 Mar 2026 ; Coordinate Uncertainty in Meters: 28359.00000.

Occurrence Remarks: This was so cool!!! Frog being eaten.; Coordinate Uncertainty in Meters: 28240.00000.

Occurrence Remarks: Most likely hit by a bike as cars arent allowed to go on this road, unless it was a rangers vehicle.; Coordinate Uncertainty in Meters: 28240.00000.

Sonoma, California: 38.46327, -122.59421: : 3/8/2026: Shane S: 8 Mar 2026 ; Coordinate Uncertainty in Meters: 28240.00000.

Occurrence Remarks: My first snake bite. Didnt hurt much. Very beautiful snake. Placed back where it was found on the side of the trail.; Coordinate Uncertainty in Meters: 28240.00000.

Mendocino, California: 38.977014, -122.993934: : 3/8/2026: Stop4Snakes!: 8 Mar 2026 ; Coordinate Uncertainty in Meters: 28181.00000.

Occurrence Remarks: This is marcianus; Coordinate Uncertainty in Meters: 28181.00000.

San Mateo, California: 37.437318, -122.369013: : 9/19/2025: mburkin: 19 Sep 2025 ; Coordinate Uncertainty in Meters: 4.00000.

San Mateo, California: 37.508828, -122.358803: : 3/9/2026: Thomas: 9 Mar 2026 ; Coordinate Uncertainty in Meters: 10.00000.

Occurrence Remarks: First snake of season spotted in field.; Coordinate Uncertainty in Meters: 4.00000.

Contra Costa, California: 37.896626, -122.254204: : 3/12/2026: thisemiliog: 12 Mar 2026 ; Coordinate Uncertainty in Meters: 3.00000.

Contra Costa, California: 37.932523, -122.136044: : 3/13/2026: Teale Fristoe: 13 Mar 2026 ; Coordinate Uncertainty in Meters: 8.00000.

Napa, California: 38.64414, -122.516263: : 3/14/2026: Isaac Vargas: 14 Mar 2026 ; Coordinate Uncertainty in Meters: 451.00000.

Marin, California: 38.048318, -122.869484: : 5/3/2026: ymacd: 3 May 2026 ; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 1847615561; Occurrence Remarks: Santa Cruz Aquatic Gartersnake ( Thamnophis atratus atratus);; Coordinate Uncertainty in Meters: 5.00000.

Sonoma, California: 38.323566, -122.696616: : 4/28/2026: wanderling: 28 Apr 2026 ; Coordinate Uncertainty in Meters: 60.00000.

Alameda, California: 37.565127, -121.583459: : 4/25/2026: Jack Baird: 25 Apr 2026 ; Coordinate Uncertainty in Meters: 5.00000.

Contra Costa, California: 37.907038, -121.949433: : 5/1/2026: jasonckass: 1 May 2026 ; Coordinate Uncertainty in Meters: 16.00000.

San Mateo, California: 37.579776, -122.513862: : 5/2/2026: Jiro: 2 May 2026 ; Coordinate Uncertainty in Meters: 426.00000.

San Mateo, California: 37.587247, -122.5065: : 4/8/2026: bdr21s: 8 Apr 2026 ; Coordinate Uncertainty in Meters: 6.00000.

Marin, California: 37.902469, -122.572471: : 5/3/2026: Megan ΓÇ£MoeΓÇ¥ Morelock: 3 May 2026 ; Coordinate Uncertainty in Meters: 7.00000.

Alameda, California: 37.506912, -121.806533: : 4/17/2026: Ezra Smith: 17 Apr 2026 ; Coordinate Uncertainty in Meters: 6.00000.

Marin, California: 38.054724, -122.878898: : 5/3/2026: Nancy Fox: 3 May 2026 ; Coordinate Uncertainty in Meters: 1203.00000.

Marin, California: 37.98321, -122.625946: : 4/21/2026: Sam Eberhard: 21 Apr 2026 ; Coordinate Uncertainty in Meters: 4.00000.

Occurrence Remarks: tims never seen this before!; Coordinate Uncertainty in Meters: 11.00000.

Mendocino, California: 39.7413, -123.633697: : 5/7/2026: zwongvan: 7 May 2026 ; Coordinate Uncertainty in Meters: 4.00000.

Marin, California: 38.028855, -122.802934: : 5/9/2026: mothernaturesson: 9 May 2026 ; Coordinate Uncertainty in Meters: 6.00000.

Mendocino, California: 39.740619, -123.631964: : 5/6/2026: gigigigigigi: 6 May 2026 ; Coordinate Uncertainty in Meters: 13.00000.

San Mateo, California: 37.559319, -122.5092: : 11/24/2025: stunfisk: 24 Nov 2025 ; Coordinate Uncertainty in Meters: 5.00000.

San Mateo, California: 37.702946, -122.433477: : 10/6/2025: Oscar molina: 6 Oct 2025 ; Coordinate Uncertainty in Meters: 3.00000.

San Mateo, California: 37.571582, -122.483045: : 12/31/2025: Jonah Benningfield: 31 Dec 2025 ; Coordinate Uncertainty in Meters: 12.00000.

Napa, California: 38.592585, -122.441981: : 1/16/2026: reptile_galen: 16 Jan 2026 ; Coordinate Uncertainty in Meters: 28240.00000.

Occurrence Remarks: First photo as found. Surprised that I did not see any Elegans.; Coordinate Uncertainty in Meters: 28300.00000.

San Joaquin, California: 37.633383, -121.556717: : 10/8/2025: saemerso: 8 Oct 2025 ; Coordinate Uncertainty in Meters: 4.00000.

San Joaquin, California: 37.634967, -121.555245: : 10/8/2025: saemerso: 8 Oct 2025 ; Coordinate Uncertainty in Meters: 9.00000.

Marin, California: 37.897404, -122.569565: : 4/25/2026: aswoodward: 25 Apr 2026 ; Coordinate Uncertainty in Meters: 0.11000.

Sonoma, California: 38.40557, -122.852229: : 3/26/2026: Clayton Rucker: 26 Mar 2026 ; Coordinate Uncertainty in Meters: 3.00000.

Sonoma, California: 38.556294, -122.638486: : 5/11/2025: supereffective: 11 May 2025 ; Coordinate Uncertainty in Meters: 6.00000.

Sonoma, California: 38.470558, -122.668701: : 5/21/2025: hibiscusbiscuits: 21 May 2025 ; Coordinate Uncertainty in Meters: 81.00000.

Occurrence Remarks: Some kind of snake. Looked grey colored, couple feet long maybe, red tongue but a black forked tip. No idea!; Coordinate Uncertainty in Meters: 0.11000.

Contra Costa, California: 37.86012, -121.889607: : 5/28/2025: gnarlyshields: 28 May 2025 ; Coordinate Uncertainty in Meters: 1.11000.

Occurrence Remarks: Found in river, good swimming, fast, black with yellow.; Coordinate Uncertainty in Meters: 845.00000.

Marin, California: 37.849078, -122.54055: : 9/2/2025: Perla M.: 2 Sep 2025 ; Coordinate Uncertainty in Meters: 4.00000.

Marin, California: 37.9886, -122.74805: : 9/21/2025: harmlee: 21 Sep 2025 ; Coordinate Uncertainty in Meters: 11.10000.

Marin, California: 38.003656, -122.672233: : 9/22/2025: dircasandderelicts: 22 Sep 2025 ; Coordinate Uncertainty in Meters: 14.00000.

Occurrence Remarks: Had a very bright red tongue. Also saw another one that I was not able to photograph.; Coordinate Uncertainty in Meters: 4248.00000.

Mendocino, California: 39.653491, -123.625572: : 5/1/2026: Gabriel Fernandez: 1 May 2026 ; Coordinate Uncertainty in Meters: 36.00000.

Contra Costa, California: 37.98398, -122.260553: : 4/9/2026: graysby: 9 Apr 2026 ; Coordinate Uncertainty in Meters: 2.00000.

Occurrence Remarks: First dead snake of season on Redwood Rd, over 30 days earlier than 2025; Coordinate Uncertainty in Meters: 3.00000.

Sonoma, California: 38.350489, -123.064517: : 3/14/2026: Mookie: 14 Mar 2026 ; Coordinate Uncertainty in Meters: 16.00000.

Marin, California: 37.843588, -122.55088: : 3/18/2026: Cole Abel: 18 Mar 2026 ; Coordinate Uncertainty in Meters: 16.00000.

Occurrence Remarks: DOA; Coordinate Uncertainty in Meters: 1.11000.

Marin, California: 37.967628, -122.654663: : 3/15/2026: derailleur: 15 Mar 2026 ; Coordinate Uncertainty in Meters: 46.00000.

Contra Costa, California: 37.836613, -121.917947: : 3/23/2026: Entrobard: 23 Mar 2026 ; Coordinate Uncertainty in Meters: 4.00000.

Contra Costa, California: 37.971532, -121.860173: : 3/12/2026: Jake Scott: 12 Mar 2026 ; Coordinate Uncertainty in Meters: 28329.00000.

Occurrence Remarks: Dead by the side of the road on a very hot day, without any visible external damage. Very sad.; Coordinate Uncertainty in Meters: 3906.00000.

Occurrence Remarks: Snake was swimming and feeding on egg mass of the Foothill Yellow Legged Frog.; Coordinate Uncertainty in Meters: 612.00000.

Contra Costa, California: 37.884737, -122.004228: : 4/4/2026: Matt Benjamin: 4 Apr 2026 ; Coordinate Uncertainty in Meters: 5.00000.

Alameda, California: 37.720617, -122.069283: : 4/2/2026: dontezimo: 2 Apr 2026 ; Coordinate Uncertainty in Meters: 3.00000.

Alameda, California: 37.595265, -121.619584: : 4/8/2026: usernameforinaturalist: 8 Apr 2026 ; Coordinate Uncertainty in Meters: 28388.00000.

Alameda, California: 37.754507, -122.040134: : 4/4/2026: Oonagh Degenhardt: 4 Apr 2026 ; Coordinate Uncertainty in Meters: 28359.00000.

Marin, California: 37.954012, -122.783071: : 4/3/2026: James T. Von Tersch: 3 Apr 2026 ; Coordinate Uncertainty in Meters: 22.00000.

Solano, California: 38.135864, -122.188117: : 10/4/2025: Silverado Jim: 4 Oct 2025 ; Coordinate Uncertainty in Meters: 4.00000.

Sonoma, California: 38.466098, -122.522113: : 10/5/2025: Dean Atchison: 5 Oct 2025 ; Coordinate Uncertainty in Meters: 2.00000.

Marin, California: 37.828976, -122.533912: : 10/14/2020: Sara Leon Guerrero: 14 Oct 2020 ; Coordinate Uncertainty in Meters: 53.00000.

Contra Costa, California: 37.925639, -122.148065: : 3/1/2025: The Vertebrate Pok├⌐dex: 1 Mar 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: Kiln Canyon; Coordinate Uncertainty in Meters: 0.11000.

Marin, California: 37.995674, -122.979077: : 4/22/2025: cloverb: 22 Apr 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Mendocino, California: 39.898789, -123.752102: : 8/3/2025: darrensmith: 3 Aug 2025 ; Coordinate Uncertainty in Meters: 12.00000.

San Mateo, California: 37.574812, -122.51812: : 7/31/2025: Max Carroll: 31 Jul 2025 ; Coordinate Uncertainty in Meters: 18.00000.

Alameda, California: 37.515669, -121.762902: : 11/3/2025: tmanzanillo: 3 Nov 2025 ; Coordinate Uncertainty in Meters: 4.00000.

Occurrence Remarks: Another vineyard road victim. Although starting to think people go out of their way to run snakes over.; Coordinate Uncertainty in Meters: 129.00000.

Alameda, California: 37.742958, -122.113136: : 6/7/2025: quercusrex: 7 Jun 2025 ; Coordinate Uncertainty in Meters: 10.00000.

Alameda, California: 37.742987, -122.113136: : 6/7/2025: quercusrex: 7 Jun 2025 ; Coordinate Uncertainty in Meters: 9.00000.

Mendocino, California: 39.745293, -123.75978: : 7/2/2025: t-trex: 2 Jul 2025 ; Coordinate Uncertainty in Meters: 302.00000.

Mendocino, California: 39.427075, -123.572197: : 7/11/2025: croconnolly: 11 Jul 2025 ; Coordinate Uncertainty in Meters: 12.00000.

Sonoma, California: 38.614083, -123.12863: : 7/28/2025: armanomidvar: 28 Jul 2025 ; Coordinate Uncertainty in Meters: 14.00000.

Mendocino, California: 39.741302, -123.633626: : 6/5/2026: Alison Young: 5 Jun 2026 ; Coordinate Uncertainty in Meters: 9.00000.

Mendocino, California: 39.741343, -123.633709: : 6/5/2026: Alison Young: 5 Jun 2026 ; Coordinate Uncertainty in Meters: 4.00000.

Mendocino, California: 39.741253, -123.633675: : 6/6/2026: viokat: 6 Jun 2026 ; Coordinate Uncertainty in Meters: 4.00000.

Mendocino, California: 39.740803, -123.631722: : 6/6/2026: yaktilhinilhmono: 6 Jun 2026 ; Coordinate Uncertainty in Meters: 37.00000.

Mendocino, California: 39.741358, -123.633667: : 6/5/2026: yaktilhinilhmono: 5 Jun 2026 ; Coordinate Uncertainty in Meters: 4.00000.

Mendocino, California: 39.7287, -123.648467: : 6/7/2026: Elly Poretsky: 7 Jun 2026 ; Coordinate Uncertainty in Meters: 4.00000.

Contra Costa, California: 37.873146, -121.789543: : 6/11/2026: Nathan Green: 11 Jun 2026 ; Coordinate Uncertainty in Meters: 28329.00000.

Marin, California: 37.931843, -122.635388: : 6/12/2026: Nestorosmin Arevalo perez: 12 Jun 2026 ; Coordinate Uncertainty in Meters: 524.00000.

Sonoma, California: 38.580618, -123.335548: : 6/17/2026: billburg: 17 Jun 2026 ; Coordinate Uncertainty in Meters: 3.00000.

Sonoma, California: 38.147608, -122.461045: : 6/17/2026: Axel Smith: 17 Jun 2026 ; Coordinate Uncertainty in Meters: 2.00000.

Contra Costa, California: 37.849333, -122.170792: : 7/11/2026: birchtainer: 11 Jul 2026 ; Coordinate Uncertainty in Meters: 11.00000.

Marin, California: 37.896387, -122.603317: : 6/17/2026: Roberto Daniel Avila: 17 Jun 2026 ; Coordinate Uncertainty in Meters: 20.00000.

Marin, California: 37.941058, -122.6232: : 6/26/2026: Trystin Knowland: 26 Jun 2026 ; Coordinate Uncertainty in Meters: 20.00000.

Contra Costa, California: 37.884468, -122.003955: : 6/27/2026: Debra Feammelli: 27 Jun 2026 ; Coordinate Uncertainty in Meters: 72.00000.

San Mateo, California: 37.436828, -122.35868: : 6/28/2026: Diego Meneses: 28 Jun 2026 ; Coordinate Uncertainty in Meters: 29.00000.

Occurrence Remarks: Injured on the main trail. Looked like a laceration about two-thirds down from the head.; Coordinate Uncertainty in Meters: 4.00000.

Occurrence Remarks: juvenile 12ΓÇ¥ or so It scooted under my foot and away before I had a better look- but coloration similar to other T. atratus Ive seen nearby; Coordinate Uncertainty in Meters: 5.00000.

Sonoma, California: 38.205441, -122.52103: : 10/8/2025: Natalie Clark: 8 Oct 2025 ; Coordinate Uncertainty in Meters: 165.00000.

San Mateo, California: 37.447731, -122.341028: : 10/7/2025: kathyf_62: 7 Oct 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Solano, California: 38.480614, -122.094985: : 4/24/2026: Brandon Mukogawa: 24 Apr 2026 ; Coordinate Uncertainty in Meters: 28240.00000.

Alameda, California: 37.516362, -121.838294: : 5/9/2026: Jiayang Li: 9 May 2026 ; Coordinate Uncertainty in Meters: 1084.00000.

San Mateo, California: 37.447595, -122.341453: : 10/7/2025: cathybrown: 7 Oct 2025 ; Coordinate Uncertainty in Meters: 376.00000.

San Mateo, California: 37.444556, -122.294117: : 10/27/2025: Sarah Wang: 27 Oct 2025 ; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 4946520803; Occurrence Remarks: approx 6 - on the beach at Elk, CA, USA;; Coordinate Uncertainty in Meters: 1846.00000.

GBIFID: 1836671315; Occurrence Remarks: I believe this is T. elegans but Im not completely certain.;; Coordinate Uncertainty in Meters: 244.00000.

GBIFID: 3456585446; Occurrence Remarks: Diablo Range Gartersnake (Thamnophis atratus zaxanthus), Mt. Diablo SP;; Coordinate Uncertainty in Meters: 2627.00000.

GBIFID: 3455898540; Occurrence Remarks: Diablo Range Gartersnake (Thamnophis atratus zaxanthus), Crestview Road, Mt. Diablo SP;; Coordinate Uncertainty in Meters: 4463.00000.

GBIFID: 1837747944; Occurrence Remarks: Found just uphill of Turtle Pond;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 1837750091; Occurrence Remarks: Probably T. atratus;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 3466222039; Occurrence Remarks: Older photo. Cast skin?;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 3466196576; Occurrence Remarks: Older photo.;; Coordinate Uncertainty in Meters: 6.00000.

GBIFID: 3466523456; Occurrence Remarks: Older photo. This one looked smaller.;; Coordinate Uncertainty in Meters: 1.11000.

GBIFID: 1838057487; Occurrence Remarks: Found on driveway by my friend.;; Coordinate Uncertainty in Meters: 200.00000.

GBIFID: 1052576585; Occurrence Remarks: Found this snake trying to swallow a California Giant Salamander .;; Coordinate Uncertainty in Meters: 1673.00000.

GBIFID: 1944370249; Occurrence Remarks: Caught this garter snake crossing the trail at creek access no. 3.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 3759188042; Occurrence Remarks: Near Bass Lake about to cross a heavily trafficked trail, full shade. Temp 65F;; Coordinate Uncertainty in Meters: 35.00000.

GBIFID: 3759693725; Occurrence Remarks: Found swimming in small pond;; Coordinate Uncertainty in Meters: 28329.00000.

GBIFID: 3759669735; Occurrence Remarks: Under log near stock pond;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 3760007388; Occurrence Remarks: Three individuals were seen here . In the last photo one was eating a tadpole .;; Coordinate Uncertainty in Meters: 28329.00000.

GBIFID: 910490586; Occurrence Remarks: Unfortunate fellow was dying after someone stepped on him on the sidewalk.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 4018544500; Occurrence Remarks: serpentine seepage area;; Coordinate Uncertainty in Meters: 7.00000.

GBIFID: 1453050904; Occurrence Remarks: Probably an intergrade. Sorry for the horrible pictures. I wasnt taking the pictures and it was hard to tell someone how to work my camera while he was peeing and pooping on me. The pooping on me was a first. Never had an animal poop on me.;; Coordinate Uncertainty in Meters: 191.00000.

GBIFID: 3961218471; Occurrence Remarks: Second one right by the first sighting.;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 1847460911; Occurrence Remarks: On trail. So small and cute!;; Coordinate Uncertainty in Meters: 64.00000.

GBIFID: 2013681729; Occurrence Remarks: Aquatic garter snake, looks like Santa Cruz? Happily feeding on many tadpoles. At least 3 in pond.;; Coordinate Uncertainty in Meters: 8.00000.

GBIFID: 3860497224; Occurrence Remarks: Adult just off the trail near mountain stream;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 3399105304; Occurrence Remarks: Swimming in pond.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 3902900085; Occurrence Remarks: A young individual .;; Coordinate Uncertainty in Meters: 28329.00000.

GBIFID: 3903596973; Occurrence Remarks: Observed on edge of creek water then swam into water.;; Coordinate Uncertainty in Meters: 561.00000.

GBIFID: 3903530044; Occurrence Remarks: In a pond with several hatchlings;; Coordinate Uncertainty in Meters: 40530.00000.

GBIFID: 1850980681; Occurrence Remarks: Two or three individuals found .;; Coordinate Uncertainty in Meters: 28329.00000.

GBIFID: 891061317; Occurrence Remarks: Roadkill, sadly.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 3915428783; Occurrence Remarks: Little one, heading towards brooks creek;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 1883466429; Occurrence Remarks: When I picked up this snake it regurgitated a salamander. Bummed I caused it to lose a meal, but that was kinda cool to see... Salamander observation here: https://www.inaturalist.org/observations/13877776;; Coordinate Uncertainty in Meters: 28300.00000.

GBIFID: 1883473628; Occurrence Remarks: Dead;; Coordinate Uncertainty in Meters: 10.00000.

GBIFID: 1883541263; Occurrence Remarks: Mentioned in comment by bobbyfingers, an identifier of the nearby California red-sided garter snake and matches pictures.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 1088969148; Occurrence Remarks: This looks like Thamnophis atratus to me, and from the California Herps website map to be an intergrade zone between subspecies zaxanthus and hydrophilus. Swimming in a creek in The Cedars serpentines.;; Coordinate Uncertainty in Meters: 12.00000.

GBIFID: 1088974960; Occurrence Remarks: Aquatic garter snake (Thamnophis atratus);; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 4039493534; Occurrence Remarks: Live leeches regurgitate by snake. Record for leeches here: https://www.inaturalist.org/observations/149210083;; Coordinate Uncertainty in Meters: 50.00000.

Contra Costa, California: 37.913778, -122.148439: : 4/6/2023: gexplorestheoutdoors: 6 Apr 2023 :

GBIFID: 4116373463; Occurrence Remarks: Intergrades;; Coordinate Uncertainty in Meters: 72.00000.

GBIFID: 1914196929; Occurrence Remarks: Found near Turtle Pond;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 1305113350; Occurrence Remarks: Several of these snakes were seen in the warm river shallows.;; Coordinate Uncertainty in Meters: 210.00000.

Mendocino, California: 39.610597, -123.739641: : 4/18/2026: Spencer Hurt: 18 Apr 2026 ; Coordinate Uncertainty in Meters: 28060.00000.

GBIFID: 1931501148; Occurrence Remarks: Santa Cruz;; Coordinate Uncertainty in Meters: 38.00000.

GBIFID: 4171325998; Occurrence Remarks: In shady river bend;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 4171706969; Occurrence Remarks: Attempting to eat a trout!;; Coordinate Uncertainty in Meters: 30.00000.

GBIFID: 4177322461; Occurrence Remarks: We watched it darting around in the shallows for a good 10 minutes, until it finally caught something, swallowed it, and then slithered off up the slope into a willow thicket.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 5133297835; Occurrence Remarks: Really distinctively patterned individual;; Coordinate Uncertainty in Meters: 6.00000.

GBIFID: 4400207948; Occurrence Remarks: Found on hwy ran over;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 891062375; Occurrence Remarks: Western ribbon garter snake. Well, not really. While doing some cleanup we spotted two snakes. They are the same species with different colorings. The hand-held one is about 2/3 the size of the other which was about 24 inches long. The shed skin may have come from the larger on since it looks about the correct size.;; Coordinate Uncertainty in Meters: 1.11000.

GBIFID: 1986511525; Occurrence Remarks: Identification based on shape of internasals and upper labials;; Coordinate Uncertainty in Meters: 209.00000.

GBIFID: 1935607535; Occurrence Remarks: Found scurrying along debris line of lagoon. What a beaut!;; Coordinate Uncertainty in Meters: 6.00000.

GBIFID: 4407628662; Occurrence Remarks: Adult DOR;; Coordinate Uncertainty in Meters: 7.00000.

GBIFID: 1945425750; Occurrence Remarks: 6th and 7th upper labial scales are enlarged, higher than wide;; Coordinate Uncertainty in Meters: 393.00000.

GBIFID: 4528308115; Occurrence Remarks: found in chaparral habitat, with no nearby bodies of water;; Coordinate Uncertainty in Meters: 7.00000.

GBIFID: 3399149309; Occurrence Remarks: juvenile.;; Coordinate Uncertainty in Meters: 3335.00000.

GBIFID: 4597101359; Occurrence Remarks: Rare beautiful warm day on the coast. Little buddy was almost certainly taking advantage of it; warming up in the sun on the hot asphalt, when he was, I can only assume, run over by a car.;; Coordinate Uncertainty in Meters: 11.00000.

Contra Costa, California: 37.85556, -121.9124: : 4/9/2024: Dan Fitzgerald (Fitz): 9 Apr 2024 :

GBIFID: 891063120; Occurrence Remarks: Greg holding the snake during the June 2011 free walk.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 4851958234; Occurrence Remarks: spent five or so minutes trying to drag the frog from the water. Frog eventually escaped. frog: https://www.inaturalist.org/observations/212145387;; Coordinate Uncertainty in Meters: 21.00000.

GBIFID: 4867814098; Occurrence Remarks: Hunting Pseudacris tadpoles.;; Coordinate Uncertainty in Meters: 15.00000.

GBIFID: 4872381732; Occurrence Remarks: 3 seen;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 4872172519; Occurrence Remarks: 3 seen;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 4909194167; Occurrence Remarks: Marin Headlands hike, specifically trying to visit new plant communities I havent explored yet. Earlier I visited Horseshoe Bay to try dock fouling for the first time. My observations from Marin Headlands: My general observations from Horseshoe Bay: ¬ My dock fouling observations from the one small public dock: Coordinate Uncertainty in Meters: 8.00000.

GBIFID: 4924177395; Occurrence Remarks: Bright pink/red tongue with black tip;; Coordinate Uncertainty in Meters: 8.00000.

GBIFID: 4946245685; Occurrence Remarks: 12-15┬áinch juvenile near pond;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 4976330506; Occurrence Remarks: Line down center of back shows garter snake, not striped racer (sadly);; Coordinate Uncertainty in Meters: 28270.00000.

GBIFID: 4976289726; Occurrence Remarks: Juvenile snake ~ 12 in. Yellow dorsal and side striping with what looked to me green/ blue spots Bright red tongue Possible Thamnophis atratus hydrophilis x Thamnophis atratus zaxanthus integrade (Oregon garter and Diablo range garter);; Coordinate Uncertainty in Meters: 23.00000.

GBIFID: 4980373967; Occurrence Remarks: What a stunner. Such a shame I forgot my camera today :/;; Coordinate Uncertainty in Meters: 28329.00000.

GBIFID: 891018830; Occurrence Remarks: Probably T. atratus due to the acute internasal scales. No red flecking on flanks or venter.;; Coordinate Uncertainty in Meters: 162.00000.

GBIFID: 4993739076; Occurrence Remarks: Eating a tadpole or salamander;; Coordinate Uncertainty in Meters: 40.00000.

GBIFID: 3355499332; Occurrence Remarks: While hunting underwater this snake occasionally stopped to rest on top of this Cladophora mat. These mats are much warmer than the surrounding water;; Coordinate Uncertainty in Meters: 31.00000.

GBIFID: 3333262316; Occurrence Remarks: the one on the right;; Coordinate Uncertainty in Meters: 24.00000.

GBIFID: 5087898445; Occurrence Remarks: pond 2 a character- swam away and then popped up like a periscope to check my whereabouts 8 labials by my count;; Coordinate Uncertainty in Meters: 4237.00000.

GBIFID: 2265810467; Occurrence Remarks: This snake , perhaps a female due to its large size , hauled out after fighting a strong current .;; Coordinate Uncertainty in Meters: 28388.00000.

GBIFID: 5104427471; Occurrence Remarks: Back to my iPhone today unfortunately Pretty sure same individual as a 3/7 observation. Same spot, escape and periscoping ( then hid on the pond bottom);; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 5108351486; Occurrence Remarks: One of my favs;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 5108291389; Occurrence Remarks: Sunning at South Beach parking area, Point Reyes, CA;; Coordinate Uncertainty in Meters: 9.00000.

GBIFID: 5134182498; Occurrence Remarks: Also Foothill Yellow-legged frogs in amplexus;; Coordinate Uncertainty in Meters: 612.00000.

GBIFID: 5134508197; Occurrence Remarks: elegans or atratus? trail crossing and did not move during the photo taking;; Coordinate Uncertainty in Meters: 4237.00000.

GBIFID: 5153131644; Occurrence Remarks: This one masked on me so I dropped it pretty fast and WOW do they smell bad.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 5205819504; Occurrence Remarks: tiny tiny baby. person on trail started handling the snake; i asked him to stop. bright red tongue with black tip.;; Coordinate Uncertainty in Meters: 11.00000.

GBIFID: 5154395192; Occurrence Remarks: Woo, target for today. Only the second or third of these snakes IΓÇÖve seen. Made such a cool grab, had to dive for this guy. Will find more this summer and get better pics≡ƒÿ¼;; Coordinate Uncertainty in Meters: 74.00000.

GBIFID: 5154953513; Occurrence Remarks: I think - first time with a garter snake;; Coordinate Uncertainty in Meters: 6.00000.

GBIFID: 5153266944; Occurrence Remarks: On trailside near lagoon, appeared to be dead;; Coordinate Uncertainty in Meters: 57.00000.

GBIFID: 3070611701; Occurrence Remarks: Munching a coast range roach;; Coordinate Uncertainty in Meters: 12.00000.

GBIFID: 2283253312; Occurrence Remarks: In Frog Pond.;; Coordinate Uncertainty in Meters: 2.00000.

GBIFID: 5188383177; Occurrence Remarks: Separate observation for the other individual;; Coordinate Uncertainty in Meters: 28388.00000.

GBIFID: 5217617135; Occurrence Remarks: Another shed!!!! BrothaΓÇª;; Coordinate Uncertainty in Meters: 28210.00000.

GBIFID: 5229988962; Occurrence Remarks: Drinking some water in the middle of the trail. Photos not in order.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 2620037402; Occurrence Remarks: About 3.5 feet long;; Coordinate Uncertainty in Meters: 8.00000.

GBIFID: 2423053385; Occurrence Remarks: Snake was swimming in creek at its mouth at the beach.;; Coordinate Uncertainty in Meters: 49.00000.

GBIFID: 2423162968; Occurrence Remarks: DOR;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 2445035931; Occurrence Remarks: Saw this beauty at my homecoming football game and moved him safely off the field.;; Coordinate Uncertainty in Meters: 143.00000.

GBIFID: 1273849978; Occurrence Remarks: Head/neck visible in extreme upper left corner of picture. T. elegans terrestris? In woods near Laurel Dell, 1 mile north of Rock Springs parking lot.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 891721122; Occurrence Remarks: Aquatic garter snake in South Fork Eel River.;; Coordinate Uncertainty in Meters: 1.11000.

GBIFID: 2456531330; Occurrence Remarks: Under board with western terrestrial garter snake! A separate observation will be made for it.;; Coordinate Uncertainty in Meters: 30.00000.

GBIFID: 2456531134; Occurrence Remarks: Found slithering across trail.;; Coordinate Uncertainty in Meters: 56.00000.

GBIFID: 2574193058; Occurrence Remarks: I have included 2 additional photos taken with my camera. The snake was a juvenile about 1 foot in length sunning itself on Blackhawk Ridge Road which is between Sycamore Creek and Knobcone Point Road. There are no cattle ponds nearby but it may have made its way up from the creek.;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 2596179114; Occurrence Remarks: Across the trail from a big and grassy meadow.;; Coordinate Uncertainty in Meters: 1.11000.

GBIFID: 2596135144; Occurrence Remarks: Not sure of the species as it is darker and browner than most Garter Snakes I see around here;; Coordinate Uncertainty in Meters: 10.00000.

GBIFID: 2609322991; Occurrence Remarks: flipped under logs, two others seen on trail;; Coordinate Uncertainty in Meters: 222.00000.

GBIFID: 3355051366; Occurrence Remarks: P2P;; Coordinate Uncertainty in Meters: 8820.00000.

GBIFID: 2619949130; Occurrence Remarks: Seen swimming;; Coordinate Uncertainty in Meters: 22.00000.

GBIFID: 2626636793; Occurrence Remarks: Found in a decomposing pile of weeds I pulled a week or two ago. Elevation about 1750 Note the blue eyes - apparently this is a sign the snake will be shedding soon.;; Coordinate Uncertainty in Meters: 1000.00000.

GBIFID: 3031646667; Occurrence Remarks: ItΓÇÖs always exciting to find a garter snake in our yard! This one was pretty little, though hard to judge how long. It was found in the evening.;; Coordinate Uncertainty in Meters: 23.00000.

Contra Costa, California: 37.926808, -122.143089: : 5/15/2020: Analisa Shields-Estrada: 15 May 2020 :

GBIFID: 2868224373; Occurrence Remarks: Too fast. CouldnΓÇÖt get a better photo.;; Coordinate Uncertainty in Meters: 10.00000.

GBIFID: 2634082850; Occurrence Remarks: I leaned my bike against the curb and was taking plant photos around the area. When I went to get back on the bike I noticed this cute little guy along the curb by my front tire!;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 2634089017; Occurrence Remarks: Small approximately 18 inches in length. Docile, non aggressive. Found in garden;; Coordinate Uncertainty in Meters: 349.00000.

Marin, California: 37.840979, -122.48161: : 5/2/2012: Jessica Weinberg McClosky: 2 May 2012 :
GBIFID: 891773781; Occurrence Remarks: Aquatic garter snake (Thamnophis atratus) at Wolfback Ridge;; Coordinate Uncertainty in Meters: 32.00000.

GBIFID: 2862312388; Occurrence Remarks: Found on the median in the middle of Alvarado-Niles boulevard. I was surprised to see it, I wasnt looking for snakes, just crossing the street. My guess is it got hit by a car and then moved of the road and partially consumed by a raven.;; Coordinate Uncertainty in Meters: 0.11000.

Contra Costa, California: 37.804945, -121.76967: : 6/17/2020: Matthew Ian McKim Louder: 17 Jun 2020 :

Mendocino, California: 39.7411, -123.632935: : 7/3/2020: Philip Georgakakos: 3 Jul 2020 :

GBIFID: 2818517614; Occurrence Remarks: so cute! map location approximate due to iNaturalist bug;; Coordinate Uncertainty in Meters: 704.00000.

GBIFID: 891046135; Occurrence Remarks: Despite exercising some care, it still got me pretty good. Coloration is pretty atratus-ish, but 8 upper labials. CORRECTION: both elegans and atratus have 8 upper labials (usually). The count is a way to separate them from sirtalis. T. atratus should not have 6 and 7 enlarged, though, as elegans does.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 2823285089; Occurrence Remarks: Eating what looks like a fish? Spotted by @danielled83.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 2823300524; Occurrence Remarks: I couldnt upload a video, so I made a gif: https://media.giphy.com/media/UV9zNLVPH4uICFl6rV/giphy.gif;; Coordinate Uncertainty in Meters: 16.00000.

GBIFID: 1453532300; Occurrence Remarks: This juvenile snake was slithering across the trail directly in front of us, from the grasslands uphill of us towards the oak/creek area downhill.;; Coordinate Uncertainty in Meters: 30.00000.

GBIFID: 1457591165; Occurrence Remarks: You can see its tongue!;; Coordinate Uncertainty in Meters: 501.00000.

GBIFID: 2850618983; Occurrence Remarks: Road kill. Spotted on my bike;; Coordinate Uncertainty in Meters: 28270.00000.

GBIFID: 1457605462; Occurrence Remarks: Of course once I switched over the video the snake starts slithering away... https://goo.gl/photos/zHqkr8tAMCM6nnn39;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 1931537301; Occurrence Remarks: Rescued form a place it couldnt get out of!;; Coordinate Uncertainty in Meters: 13.00000.

GBIFID: 911492071; Occurrence Remarks: Pretty sure this is T. atratus. Rear chin shields longer than front ones, 6th & 7th upper labials are not too big. Internasals are longer than wide and pointed in front. Middle dorsal stripe had a cool orange line down it, though.;; Coordinate Uncertainty in Meters: 10630.00000.

GBIFID: 899951180; Occurrence Remarks: Thamnophis atratus. Claremont Canyon Regional Preserve. Berkeley, California.;; Coordinate Uncertainty in Meters: 1.11000.

GBIFID: 2860083023; Occurrence Remarks: Smallish, baby;; Coordinate Uncertainty in Meters: 13.00000.

GBIFID: 899953736; Occurrence Remarks: This snake was in the water and caught a tadpole. I have a video of it attacking, but cannot load it here.;; Coordinate Uncertainty in Meters: 8.00000.

GBIFID: 1500300505; Occurrence Remarks: Found 3 juveniles by the pond, but I only caught 2 and only one didnt musk on me. This one was my favorite because it didnt musk on me. :-);; Coordinate Uncertainty in Meters: 191.00000.

GBIFID: 1500300500; Occurrence Remarks: The second individual I caught. This one musked all over me.;; Coordinate Uncertainty in Meters: 191.00000.

GBIFID: 1500344625; Occurrence Remarks: Video at https://youtu.be/Pw-zlrVwcCI;; Coordinate Uncertainty in Meters: 114.00000.

GBIFID: 899961339; Occurrence Remarks: Found two of them, most likely eating many Pseudacris sierra tadpoles.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 2603428011; Occurrence Remarks: An absolute beauty crossing the warm sidewalk in Riverkeeper Stewardship Park.;; Coordinate Uncertainty in Meters: 15.00000.

GBIFID: 1562978956; Occurrence Remarks: Found under water cover. I brought it up to the surface using a grass noose. I keep finding herps under the covers here, but it seems like they can never get out by crawling underneath the hole, what gives??;; Coordinate Uncertainty in Meters: 30.00000.

GBIFID: 1931537531; Occurrence Remarks: Found a few of these fellows by the pond in the quarry at Sibley. Musk smells great!;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 2005404410; Occurrence Remarks: Found along the edge of the river on a steep sunny slope.;; Coordinate Uncertainty in Meters: 977.00000.

GBIFID: 1572335299; Occurrence Remarks: Found two snakes in the water, one larger than the other by 4 or 5 inches. They were swimming when we found them. We watched them in this small side channel, back water area. We watched them for about 10 minutes before the little one slithered onto land and up the hillside. The larger one stuck around for another couple minutes before following.;; Coordinate Uncertainty in Meters: 977.00000.

GBIFID: 2963866248; Occurrence Remarks: On Montara Mountain trail;; Coordinate Uncertainty in Meters: 160.00000.

GBIFID: 1572335927; Occurrence Remarks: Didnt realize this was a pair until I scoped out the photo in Lightroom.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 2988448820; Occurrence Remarks: Little dude was too wriggly for any good photos, but I think its this and not T. e. terrestris;; Coordinate Uncertainty in Meters: 6.00000.

GBIFID: 4018123404; Occurrence Remarks: This looked like a flattened snake or lizard. Maybe it is from a shed skin?;; Coordinate Uncertainty in Meters: 564.00000.

Contra Costa, California: 37.8204, -121.792162: : 3/30/2026: em_stivers: 30 Mar 2026 ; Coordinate Uncertainty in Meters: 11.00000.

GBIFID: 1572339282; Occurrence Remarks: Video at https://youtu.be/-hmZ9OV0bmA;; Coordinate Uncertainty in Meters: 8.00000.

GBIFID: 1052569027; Occurrence Remarks: Found in burn zone a long distance from water .;; Coordinate Uncertainty in Meters: 28329.00000.

Yolo, California: 38.498738, -122.022216: : 3/20/2026: K Calderala: 20 Mar 2026 ; Coordinate Uncertainty in Meters: 28240.00000.

GBIFID: 911507398; Occurrence Remarks: According to Californiaherps.com, this appears to be an intergrade between T. a. hydrophilus (Oregon gartersnake) and T.a.stratus, and T.a. zaxanthus. This snake shows an orange dorsal stripe; 8 upper labial scales with 6 and 7 enlarged, higher-than-wide. Black base color between side stripe and dorsal stripe with flecks of turquoise, completely lacking in red on sides. Observed on Inverness Ridge near Mount Vision on dry sandy slope (mostly decomposed granite substrate) about 100 m from nearest stream.;; Coordinate Uncertainty in Meters: 541.00000.

GBIFID: 2963856301; Occurrence Remarks: Black with yellow stripes. There were 2 present. This one chased the other one away. Earlier in the day, one was observed eating a small fuzzy animal.;; Coordinate Uncertainty in Meters: 9.00000.

GBIFID: 3383919302; Occurrence Remarks: This small snake (about 15 to 20 long) was foraging in the Japanese Pond at the botanical garden, clearly trying to nab some tadpoles. By my old Peterson field guide, I would identify this as the Aquatic Garter Snake, Thamnophis couchi aquaticus, but I believe that, based on CaliforniaHerps.com, this would be termed the Diablo Range Garter Snake, Thamnophis atratus zaxanthus. Ill appreciate a proper ID for it.;; Coordinate Uncertainty in Meters: 10.00000.

GBIFID: 2868095306; Occurrence Remarks: Juvenile found underneath log.;; Coordinate Uncertainty in Meters: 10.00000.

GBIFID: 1042812768; Occurrence Remarks: Found swimming among the rocks in the South Fork of the Eel River.;; Coordinate Uncertainty in Meters: 13.00000.

GBIFID: 3113259754; Occurrence Remarks: Found in a group of 3 next to a small pond.;; Coordinate Uncertainty in Meters: 215.00000.

GBIFID: 3113395421; Occurrence Remarks: Rescued this little guy from the road;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 2634262329; Occurrence Remarks: About 12 long.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 3118388932; Occurrence Remarks: Next to creek bed;; Coordinate Uncertainty in Meters: 43.00000.

GBIFID: 3301902063; Occurrence Remarks: pretty sure the species is right, because it doesnΓÇÖt have red. one of a few on the trail in the redwoods;; Coordinate Uncertainty in Meters: 1073.00000.

GBIFID: 1038289058; Occurrence Remarks: IDd by upper labial scales. Moved off the road so it wouldnt get run over.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 3314304494; Occurrence Remarks: Somewhat unusual patternless (or near patternless) individual;; Coordinate Uncertainty in Meters: 28121.00000.

GBIFID: 2332081701; Occurrence Remarks: Many aquatic garter snakes, adults and juveniles, were observed in and around a series of man-made ponds.;; Coordinate Uncertainty in Meters: 1963.00000.

GBIFID: 1024203950; Occurrence Remarks: About 18 inches (45 cm) long. Black with yellow stripe down the back.;; Coordinate Uncertainty in Meters: 0.11000.

San Mateo, California: 37.449525, -122.3963: : 7/5/2021: Jeremiah Degenhardt: 5 Jul 2021 :

GBIFID: 1024219970; Occurrence Remarks: A very young individual .;; Coordinate Uncertainty in Meters: 1086.00000.

GBIFID: 3328064326; Occurrence Remarks: Scooted off the road;; Coordinate Uncertainty in Meters: 28359.00000.

GBIFID: 1702479542; Occurrence Remarks: or T. elegans terrestris? Little guy on side of creek channel;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 1024226035; Occurrence Remarks: Found in middle of trail in wooded section near a gully . A very young individual .;; Coordinate Uncertainty in Meters: 544.00000.

GBIFID: 2963743301; Occurrence Remarks: This garter snake was just chilling on a rock even though a bunch of our kids were looking at it. No red markings, and its back stripe was a creamy orange.;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 891085534; Occurrence Remarks: Santa Cruz garter snake found at San Pedro valley park;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 3343832787; Occurrence Remarks: Alameda County , California . At least 4 individuals seen .;; Coordinate Uncertainty in Meters: 28388.00000.

GBIFID: 3343808755; Occurrence Remarks: Alameda County , California . At least 4 individuals seen .;; Coordinate Uncertainty in Meters: 28388.00000.

GBIFID: 3355087916; Occurrence Remarks: On edge of lagoon;; Coordinate Uncertainty in Meters: 24.00000.

GBIFID: 3355740421; Occurrence Remarks: Damn, DOR ≡ƒÿú≡ƒÿó;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 3385114776; Occurrence Remarks: Juvenile. I also found an adult garter and a ringneck snake the same day; but weΓÇÖre too fast to take a pictures of unfortunately.;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 3384054860; Occurrence Remarks: Found on the road; thinking possibly a coast garter snake based on range, but this snake lacked the red coloration I normally see in that species.;; Coordinate Uncertainty in Meters: 45.00000.

GBIFID: 1807311294; Occurrence Remarks: Found slithering across the Meadow Trail;; Coordinate Uncertainty in Meters: 11.00000.

GBIFID: 3385193700; Occurrence Remarks: eating foothill yellow-legged frog;; Coordinate Uncertainty in Meters: 10.00000.

GBIFID: 3384569671; Occurrence Remarks: eating juvenile newt;; Coordinate Uncertainty in Meters: 77.00000.

GBIFID: 3079556418; Occurrence Remarks: Was about 14 inches long and 1/4+ inches wide.;; Coordinate Uncertainty in Meters: 0.11000.

Napa, California: 38.192458, -122.254853: : 8/6/2025: Silverado Jim: 6 Aug 2025 ; Coordinate Uncertainty in Meters: 15.00000.

San Mateo, California: 37.585849, -122.525459: : 7/25/2026: Rayyan Syed Ibrahim: 25 Jul 2026 ; Coordinate Uncertainty in Meters: 28388.00000.

Alameda, California: 37.546067, -121.70977: : 8/15/2025: ebrpd: 15 Aug 2025 ; Coordinate Uncertainty in Meters: 14.00000.

Marin, California: 37.954216, -122.717657: : 8/28/2025: moosejuice16: 28 Aug 2025 ; Coordinate Uncertainty in Meters: 16.00000.

San Mateo, California: 37.571266, -122.473098: : 8/26/2025: Barbara Kossy: 26 Aug 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Contra Costa, California: 37.976172, -122.298583: : 8/29/2025: yuliapink: 29 Aug 2025 ; Coordinate Uncertainty in Meters: 10.00000.

Marin, California: 37.9564, -122.614296: : 8/22/2025: LJ Moore-McClelland: 22 Aug 2025 ; Coordinate Uncertainty in Meters: 188.00000.

Marin, California: 37.919005, -122.625137: : 7/8/2026: Gabby Farrer: 8 Jul 2026 ; Coordinate Uncertainty in Meters: 4.00000.

Occurrence Remarks: On the left; Coordinate Uncertainty in Meters: 28388.00000.

Occurrence Remarks: A very pretty one; Coordinate Uncertainty in Meters: 28388.00000.

Marin, California: 37.861963, -122.429541: : 8/1/2025: sierrahkr: 1 Aug 2025 ; Coordinate Uncertainty in Meters: 3.00000.

Sonoma, California: 38.663159, -122.935345: : 9/5/2025: Stop4Snakes!: 5 Sep 2025 ; Coordinate Uncertainty in Meters: 28210.00000.

Occurrence Remarks: Heard something slip into a sedge. two minutes of poking around in it, and a cut finger later, was able to spot this fella!; Coordinate Uncertainty in Meters: 28210.00000.

Marin, California: 38.014747, -122.84133: : 9/6/2025: Chuck Wilson: 6 Sep 2025 ; Coordinate Uncertainty in Meters: 14.00000.

Sonoma, California: 38.388213, -122.928747: : 8/30/2025: Matthew: 30 Aug 2025 ; Coordinate Uncertainty in Meters: 12.00000.

San Mateo, California: 37.480965, -122.374483: : 7/15/2026: myzomela: 15 Jul 2026 ; Coordinate Uncertainty in Meters: 132181.00000.

Alameda, California: 37.661464, -121.931856: : 8/11/2025: james-vg: 11 Aug 2025 ; Coordinate Uncertainty in Meters: 5.00000.

Alameda, California: 37.645511, -121.91845: : 8/11/2025: james-vg: 11 Aug 2025 ; Coordinate Uncertainty in Meters: 5.00000.

San Mateo, California: 37.574888, -122.477783: : 11/6/2025: andreareid: 6 Nov 2025 ; Coordinate Uncertainty in Meters: 4.00000.

Sonoma, California: 38.389147, -122.930488: : 10/17/2025: elkask: 17 Oct 2025 ; Coordinate Uncertainty in Meters: 49.00000.

Sonoma, California: 38.458, -123.143272: : 11/8/2025: k4yl4t: 8 Nov 2025 ; Coordinate Uncertainty in Meters: 4.00000.

Sonoma, California: 38.766689, -122.880863: : 9/13/2025: Stop4Snakes!: 13 Sep 2025 ; Coordinate Uncertainty in Meters: 28210.00000.

Sonoma, California: 38.32338, -122.689312: : 9/11/2025: beeeezzzzz: 11 Sep 2025 ; Coordinate Uncertainty in Meters: 1.11000.

San Mateo, California: 37.511463, -122.352403: : 11/24/2025: Thomas: 24 Nov 2025 ; Coordinate Uncertainty in Meters: 13.00000.

Contra Costa, California: 38.024418, -122.280263: : 10/20/2025: Membre├▒o: 20 Oct 2025 ; Coordinate Uncertainty in Meters: 114.00000.

Occurrence Remarks: Approximately 2.5 feet long; Coordinate Uncertainty in Meters: 9.00000.

Josephine, Oregon: 42.229214, -123.702758: : 3/21/2026: Dee Shea Himes: 21 Mar 2026 ; Coordinate Uncertainty in Meters: 7.00000.

Occurrence Remarks: Occurrence Remarks: found this baby swimming in shallow water, first snake thats bitten me in 14 years; Coordinate Uncertainty in Meters: 609.00000.

Josephine, Oregon: 42.630482, -123.456878: : 7/26/2026: Stormy Concoby: 26 Jul 2026 ; Coordinate Uncertainty in Meters: 27599.00000.

Humboldt, California: 40.868871, -123.984961: : 4/22/2024: Theodore Lee: 22 Apr 2024 ; Coordinate Uncertainty in Meters: 2479.00000.

Del Norte, California: 41.861246, -123.963172: : 5/18/2026: lzamorac: 18 May 2026 ; Coordinate Uncertainty in Meters: 0.11000.

Del Norte, California: 41.79333, -124.097694: : 5/13/2026: Andrew Clifford: 13 May 2026 ; Coordinate Uncertainty in Meters: 8765.00000.

Humboldt, California: 40.870578, -123.962492: : 3/28/2026: willow: 28 Mar 2026 ; Coordinate Uncertainty in Meters: 0.11000.

Humboldt, California: 40.854049, -123.990222: : 4/22/2026: Jaime Martinez: 22 Apr 2026 ; Coordinate Uncertainty in Meters: 72.00000.

Josephine, Oregon: 42.3023, -123.775725: : 4/25/2026: maureen-j-jules: 25 Apr 2026 ; Coordinate Uncertainty in Meters: 14.00000.

Del Norte, California: 41.746032, -124.201513: : 11/16/2025: Beatrice Pezzolo: 16 Nov 2025 ; Coordinate Uncertainty in Meters: 11.00000.

Del Norte, California: 41.843628, -123.928064: : 5/13/2026: Chris Roberts: 13 May 2026 ; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: Observed this snake, did not see a rattle on the tail, not sure what species it is.; Coordinate Uncertainty in Meters: 327.00000.

GBIFID: 1098912228; Occurrence Remarks: Photos taken by my friend of this garter snake sitting near us on rocks next to a fast running stream.;; Coordinate Uncertainty in Meters: 24.00000.

Humboldt, California: 40.192863, -123.769517: : 8/10/2025: josephnolan: 10 Aug 2025 ; Coordinate Uncertainty in Meters: 4.00000.

Del Norte, California: 41.836033, -123.941223: : 8/17/2025: carsonking440: 17 Aug 2025 ; Coordinate Uncertainty in Meters: 2660.00000.

Trinity, California: 41.117692, -122.704056: : 6/13/2025: Matt Berger: 13 Jun 2025 ; Coordinate Uncertainty in Meters: 5.00000.

Humboldt, California: 40.856092, -123.989662: : 3/1/2026: lex: 1 Mar 2026 ; Coordinate Uncertainty in Meters: 13.00000.

Shasta, California: 40.585994, -122.55175: : 3/30/2026: Liam Ehrman: 30 Mar 2026 ; Coordinate Uncertainty in Meters: 5.00000.

Humboldt, California: 40.857192, -123.988665: : 4/18/2026: cjwills: 18 Apr 2026 ; Coordinate Uncertainty in Meters: 31.00000.

Trinity, California: 40.898845, -123.022347: : 4/29/2026: Deb Kemp: 29 Apr 2026 ; Coordinate Uncertainty in Meters: 4.00000.

Humboldt, California: 40.854374, -123.990116: : 4/22/2026: jjjul3s: 22 Apr 2026 ; Coordinate Uncertainty in Meters: 187.00000.

Trinity, California: 40.430169, -123.486626: : 4/22/2026: cassndras: 22 Apr 2026 ; Coordinate Uncertainty in Meters: 745.00000.

Trinity, California: 40.392895, -123.222725: : 5/9/2026: jandrewsal: 9 May 2026 ; Coordinate Uncertainty in Meters: 4.00000.

Humboldt, California: 40.058844, -124.079381: : 4/18/2025: Kaci Carpenter: 18 Apr 2025 ; Coordinate Uncertainty in Meters: 2.00000.

Humboldt, California: 40.058855, -124.079381: : 4/18/2025: Kaci Carpenter: 18 Apr 2025 ; Coordinate Uncertainty in Meters: 3.00000.

Occurrence Remarks: found in tree stump near Mad River Hatchery; Coordinate Uncertainty in Meters: 221.00000.

Douglas, Oregon: 42.951605, -123.590287: : 9/13/2025: Andrew Pauly: 13 Sep 2025 ; Coordinate Uncertainty in Meters: 27568.00000.

Douglas, Oregon: 42.851733, -123.499687: : 9/13/2025: Andrew Pauly: 13 Sep 2025 ; Coordinate Uncertainty in Meters: 27568.00000.

Trinity, California: 40.551528, -123.300012: : 9/22/2025: jakesullivvan: 22 Sep 2025 ; Coordinate Uncertainty in Meters: 9.00000.

Del Norte, California: 41.987142, -124.113556: : 9/16/2025: california_every_reptile: 16 Sep 2025 ; Coordinate Uncertainty in Meters: 27723.00000.

Siskiyou, California: 41.560347, -123.059728: : 9/13/2025: wetlandwanderer: 13 Sep 2025 ; Coordinate Uncertainty in Meters: 6.00000.

Siskiyou, California: 41.560691, -123.059867: : 9/13/2025: wetlandwanderer: 13 Sep 2025 ; Coordinate Uncertainty in Meters: 10.00000.

Trinity, California: 40.02285, -123.424208: : 5/16/2026: brock: 16 May 2026 ; Coordinate Uncertainty in Meters: 11.00000.

Trinity, California: 40.012639, -123.42157: : 5/16/2026: brock: 16 May 2026 ; Coordinate Uncertainty in Meters: 4.00000.

Occurrence Remarks: Or aquatic?; Coordinate Uncertainty in Meters: 27599.00000.

Humboldt, California: 41.324263, -124.010903: : 2/10/2026: kennedygrace88: 10 Feb 2026 ; Coordinate Uncertainty in Meters: 57.00000.

Occurrence Remarks: Sanke had a frog in mouth. Frog may be Rana boylii.; Coordinate Uncertainty in Meters: 6.00000.

Humboldt, California: 40.124292, -124.168617: : 3/17/2026: Trystin Knowland: 17 Mar 2026 ; Coordinate Uncertainty in Meters: 8.00000.

Humboldt, California: 40.856064, -123.988572: : 3/20/2026: Cassie: 20 Mar 2026 ; Coordinate Uncertainty in Meters: 5.00000.

Shasta, California: 41.123795, -122.167275: : 4/5/2026: ericaharris123: 5 Apr 2026 ; Coordinate Uncertainty in Meters: 35.00000.

Siskiyou, California: 41.185368, -122.293322: : 5/10/2025: aishwaryakancharla: 10 May 2025 ; Coordinate Uncertainty in Meters: 15.00000.

Occurrence Remarks: Not certain on the ID, please help. Caught on Clear Creek in the siskiyou wilderness probably around 3000 ft; Coordinate Uncertainty in Meters: 3920.00000.

Siskiyou, California: 41.289378, -122.351731: : 6/17/2025: laurazg1: 17 Jun 2025 ; Coordinate Uncertainty in Meters: 4.00000.

Occurrence Remarks: Snake swallowing a fish; Coordinate Uncertainty in Meters: 172.00000.

Humboldt, California: 40.118103, -124.144439: : 7/25/2025: Jacob Coker-Dukowitz: 25 Jul 2025 ; Coordinate Uncertainty in Meters: 6.00000.

Humboldt, California: 40.355482, -123.920107: : 8/5/2025: Chris Brown: 5 Aug 2025 ; Coordinate Uncertainty in Meters: 4.00000.

Occurrence Remarks: Super unfortunate DOR Douglas County; Coordinate Uncertainty in Meters: 27568.00000.

Occurrence Remarks: Super sad DOR again Douglas County; Coordinate Uncertainty in Meters: 27568.00000.

Occurrence Remarks: Flipped under roadside rock, first of 2025 Josephine County; Coordinate Uncertainty in Meters: 27692.00000.

Occurrence Remarks: DOR Jackson County; Coordinate Uncertainty in Meters: 27692.00000.

Occurrence Remarks: Pretty sure this is the second individual I saw Curry County; Coordinate Uncertainty in Meters: 27630.00000.

Occurrence Remarks: A couple milling around feeding on tadpoles but I only got photos of one Curry County; Coordinate Uncertainty in Meters: 27630.00000.

Trinity, California: 40.882388, -123.02468: : 6/15/2025: jandrewsal: 15 Jun 2025 ; Coordinate Uncertainty in Meters: 3.00000.

Siskiyou, California: 41.2434, -122.009261: : 6/6/2026: Justin Paulin: 6 Jun 2026 ; Coordinate Uncertainty in Meters: 49.00000.

Shasta, California: 41.117203, -122.0616: : 6/14/2026: Abe Doherty: 14 Jun 2026 ; Coordinate Uncertainty in Meters: 10.00000.

Trinity, California: 41.221751, -122.609845: : 6/15/2026: Charlee: 15 Jun 2026 ; Coordinate Uncertainty in Meters: 27816.00000.

Curry, Oregon: 42.110593, -124.185625: : 6/11/2026: hopeforhope98: 11 Jun 2026 ; Coordinate Uncertainty in Meters: 4.00000.

Siskiyou, California: 41.428847, -122.965562: : 6/15/2026: rita_roo: 15 Jun 2026 ; Coordinate Uncertainty in Meters: 12.00000.

Humboldt, California: 40.145, -123.991225: : 7/7/2026: yuliapink: 7 Jul 2026 ; Coordinate Uncertainty in Meters: 20.00000.

Occurrence Remarks: Hanging out in whatΓÇÖs left of the stream. Pretty feisty little guy.; Coordinate Uncertainty in Meters: 4.00000.

Humboldt, California: 40.245098, -124.343864: : 6/16/2026: sdredfern64: 16 Jun 2026 ; Coordinate Uncertainty in Meters: 360.00000.

Curry, Oregon: 42.18738, -123.983895: : 6/16/2026: Dee Shea Himes: 16 Jun 2026 ; Coordinate Uncertainty in Meters: 4.00000.

Occurrence Remarks: Swimming and slithering through the rocks along the Illinois River; Coordinate Uncertainty in Meters: 187.00000.

Humboldt, California: 40.85595, -123.98863: : 10/12/2025: Zoey Vadnais: 12 Oct 2025 ; Coordinate Uncertainty in Meters: 1.11000.

GBIFID: 3455965424; Occurrence Remarks: It went into the smith river;; Coordinate Uncertainty in Meters: 1960.00000.

GBIFID: 3456201640; Occurrence Remarks: Mad River, Blue Lake. 7:00 pm. Clear skies, 62F. Juvenile, alive. Found swimming in shallow pool on the side of the river. Banks rocky with sedges, blackberry, willow, conifers on each side. Small fish, FYLF tadpoles and small adults found in same pool.;; Coordinate Uncertainty in Meters: 15.00000.

GBIFID: 3416055113; Occurrence Remarks: Oregon Garter Snake (Thamnophis atratus hydrophilus) photographed swimming in river, northwestern Trinity County, California;; Coordinate Uncertainty in Meters: 500.00000.

GBIFID: 1838023557; Occurrence Remarks: Juvenile;; Coordinate Uncertainty in Meters: 27877.00000.

GBIFID: 3067646384; Occurrence Remarks: Santa Cruz Aquatic Garter Snake (Thamnophis atratus atratus);; Coordinate Uncertainty in Meters: 61.00000.

GBIFID: 3772624435; Occurrence Remarks: 8 upper labial scales, front chin shields shorter than rear. Found under an artificial cover object (~4├ù4 ft piece of plywood) near vernal pond. Sunny conditions, no direct canopy cover but open woodland nearby. 74┬░F.;; Coordinate Uncertainty in Meters: 27877.00000.

GBIFID: 3773552367; Occurrence Remarks: Found in decaying log near vernal pond. Light to moderate canopy cover overhead. Sunny conditions, 74┬░F. Last picture comparison with common gartersnake.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 3773386735; Occurrence Remarks: Located about 10feet from shore of Mad River. Hiding in brush, basking slightly on a rock underneath blackberry bramble. Very sunny with light breeze, about 64 degrees.;; Coordinate Uncertainty in Meters: 9443.00000.

GBIFID: 3858537394; Occurrence Remarks: Found on the edge of a vernal pond. 74┬░F cloudy, windy conditions.;; Coordinate Uncertainty in Meters: 27877.00000.

GBIFID: 3860483375; Occurrence Remarks: Small individual found near edge of vernal pond. 74┬░F, cloudy, windy conditions.;; Coordinate Uncertainty in Meters: 27877.00000.

GBIFID: 3889174457; Occurrence Remarks: Slender silver snake (6-8 maybe?);; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 3859810220; Occurrence Remarks: Hiding under a rock with tail out, underwater, tail wiggling, maybe hunting? Tounge flicking quite frequent underwater.;; Coordinate Uncertainty in Meters: 16.00000.

GBIFID: 3881461477; Occurrence Remarks: assuming because it swam into the water and caught a juvenile oncorhynchus sp.? in a deeper area of canyon creek;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 3881761508; Occurrence Remarks: Tendency to swim into open water when approached;; Coordinate Uncertainty in Meters: 9.00000.

GBIFID: 3873818091; Occurrence Remarks: Submerged;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 1949978018; Occurrence Remarks: Under bark;; Coordinate Uncertainty in Meters: 12.00000.

Humboldt, California: 40.856082, -123.988525: : 4/22/2026: Matthew Copenhaver: 22 Apr 2026 ; Coordinate Uncertainty in Meters: 24.00000.

GBIFID: 3902323273; Occurrence Remarks: ~13inches, juvenile;; Coordinate Uncertainty in Meters: 11.00000.

GBIFID: 3966556869; Occurrence Remarks: Picture taken by my father, posted with permission;; Coordinate Uncertainty in Meters: 676.00000.

GBIFID: 3947272301; Occurrence Remarks: Western Aquatic.;; Coordinate Uncertainty in Meters: 11.00000.

GBIFID: 4063005964; Occurrence Remarks: RX10_24396, RX10_24397;; Coordinate Uncertainty in Meters: 3.00000.

GBIFID: 4112054623; Occurrence Remarks: Found on the bank of a flowing river at mad river hatchery. Temperature 56F, cloudy. Rained earlier in the morning. I believe this is an Oregon gartersnake because of the eight labial scales and lack of dorsal stripe.;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 1901050324; Occurrence Remarks: Trifecta!! Competing in tug-o-war with a common garter snake for adult female cascades frog prey. Amazing rare observation! Published observation in Herpetological Review as a note: Garwood, J., and N. Garwood. 2020. Thamnophis sirtalis fitchi (Valley Garter Snake) and Thamnophis atratus hydrophilus (Oregon Aquatic Garter Snake). Foraging Competition. Herpetological Review 51:881-881.;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 1913696405; Occurrence Remarks: Not 100% confident on species;; Coordinate Uncertainty in Meters: 27754.00000.

GBIFID: 1913696282; Occurrence Remarks: Not 100% confident on species;; Coordinate Uncertainty in Meters: 27754.00000.

GBIFID: 4453702840; Occurrence Remarks: In a small stream within a verdant marsh;; Coordinate Uncertainty in Meters: 121.00000.

GBIFID: 4405087826; Occurrence Remarks: Stripe on head, but very hard to tell if any stripe down rest of body body. 2-2.5 feet long. Garter snake head shape.;; Coordinate Uncertainty in Meters: 47.00000.

GBIFID: 4400182761; Occurrence Remarks: Some type of snake catching and eating a rainbow trout;; Coordinate Uncertainty in Meters: 126.00000.

GBIFID: 1933560597; Occurrence Remarks: Eddy Creek, Shasta-Trinity National Forest Siskiyou County, California;; Coordinate Uncertainty in Meters: 122.00000.

GBIFID: 1143524818; Occurrence Remarks: Just south of the lower canyon creek lake in the stream.;; Coordinate Uncertainty in Meters: 258.00000.

GBIFID: 1990542995; Occurrence Remarks: One of four species of garter snake found within 500 feet of each other, all within one hour.;; Coordinate Uncertainty in Meters: 27723.00000.

GBIFID: 4519326706; Occurrence Remarks: Snake found on riverbank;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 4946589128; Occurrence Remarks: Sunny 55 degrees F. Habitat was rock talus next to a river. Surrounded by tall bushes and alder trees. Identified based on 8 upper labial scales and other various head scales.;; Coordinate Uncertainty in Meters: 507.00000.

GBIFID: 4855348334; Occurrence Remarks: April 22nd, 2024 at 1:23pm. Aquatic garter snake Thamnophis atratus Location. Mad River Hatchery Weather: Around 70 F, very Sunday day Juvenile Habitat: consists of various trees, the mad river, riparian plants, and grass areas with many trails occupied by humans. Lots of blackberry and poison oak. Specimen was found near a hollow log underneath a coyote brush, seemed to be slithering away from me looking around the log. I found the snake and someone else caught it and handed it over to me. This area was more dry and farther from the river, but still close to the bank. I identified this as aquatic garter snake due to the pale gray body with orange/yellow dorsal stripe and pale throat. Chin shields were not equal in length, indicating it was not thamnophis elegans. Lateral stripes not present. Unfortunately I only had one pic of this one due to my excitement of seeing and holding it. I did not think to take more.;; Coordinate Uncertainty in Meters: 68.00000.

GBIFID: 4863606854; Occurrence Remarks: Found on the waters edge of the Mad River near praying after a Rana boylii;; Coordinate Uncertainty in Meters: 41.00000.

GBIFID: 4863573180; Occurrence Remarks: Location: Mad River Hatchery Weather: Sunny and warm, clear skies, high 60ΓÇÖs, mid humidity Habitat: Shrubby habitat with lots of rocks and relatively dry soil. Lots of water near by (river and seasonal pools) Individual found near small, drying up puddle filled with Pseudacris regilla tadpoles. Upon capture 6 tadpoles were regurgitated. In a shrubby coyote brush habitat. ID determined by rear chin shields that are longer than the front, 8 upper labial scales, internasals longer than wide and pointed at front, and 6th and 7th upper labials not enlarged.;; Coordinate Uncertainty in Meters: 34.00000.

GBIFID: 4935876713; Occurrence Remarks: 8 upper labial scales, rear and front chin shields are the same length. found swimming in standing water by the river. It expelled its musk on me and smelled so bad.;; Coordinate Uncertainty in Meters: 3.00000.

GBIFID: 4872395581; Occurrence Remarks: Found under a large chunk of driftwood on a rocky stream bed near fast flowing water. Eight upper labial scales with the seventh notably longer than the sixth helped rule out common and northwesterns. Long and pointed internasal scale along with clean unmarked underside, and dull, faded dorsal stripe distinguished from western terrestrial. The habitat played a factor in this distinction as well.;; Coordinate Uncertainty in Meters: 7.00000.

GBIFID: 4875342859; Occurrence Remarks: Luke capture;; Coordinate Uncertainty in Meters: 27877.00000.

GBIFID: 4892045890; Occurrence Remarks: Crossing towards water Lifer! Douglas County;; Coordinate Uncertainty in Meters: 27568.00000.

GBIFID: 4910832864; Occurrence Remarks: In the Smith River.;; Coordinate Uncertainty in Meters: 11.00000.

GBIFID: 4901077021; Occurrence Remarks: Screenshot from instagram, as I unfortunately lost all my photos from this weekend trip to southern Oregon Josephine County;; Coordinate Uncertainty in Meters: 27661.00000.

GBIFID: 4901001794; Occurrence Remarks: Photo by @cana_llyn Del Norte County;; Coordinate Uncertainty in Meters: 27723.00000.

GBIFID: 4901370725; Occurrence Remarks: Last two photos by @cana_llyn . One of my favorite snake encounters this year, this snake hung out with us on a gravel bar for at least 20 minutes, and was calm enough to let us watch it forage after initially grabbing it. Super awesome encounter Del Norte County;; Coordinate Uncertainty in Meters: 27723.00000.

GBIFID: 4902012395; Occurrence Remarks: Josephine County;; Coordinate Uncertainty in Meters: 27661.00000.

GBIFID: 4901043703; Occurrence Remarks: Josephine County;; Coordinate Uncertainty in Meters: 27661.00000.

GBIFID: 2311275317; Occurrence Remarks: Under bark;; Coordinate Uncertainty in Meters: 27877.00000.

GBIFID: 4904325928; Occurrence Remarks: Heading towards small tributary creek Douglas County;; Coordinate Uncertainty in Meters: 27568.00000.

GBIFID: 5230015471; Occurrence Remarks: Need help with ID. Seen in water along Clear Creek. Approximately 12-18inches long. Thin as a straw.;; Coordinate Uncertainty in Meters: 355.00000.

GBIFID: 4945491541; Occurrence Remarks: Best guess;; Coordinate Uncertainty in Meters: 941.00000.

GBIFID: 4950213184; Occurrence Remarks: Feisty little dude.;; Coordinate Uncertainty in Meters: 27661.00000.

GBIFID: 4846936357; Occurrence Remarks: Middle Falls, McCloud River;; Coordinate Uncertainty in Meters: 8.00000.

GBIFID: 5006935690; Occurrence Remarks: Having a hard time identifying :p Insta: e._.sammy;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 5007580088; Occurrence Remarks: Found along the bank of the Rogue River;; Coordinate Uncertainty in Meters: 44.00000.

GBIFID: 5177178503; Occurrence Remarks: Sunning alongside river. Mid-high 70s temps, approx 2:10p;; Coordinate Uncertainty in Meters: 27816.00000.

Trinity, California: 40.992963, -123.030329: : 7/4/2019: Chloe and Trevor Van Loon: 4 Jul 2019 :

GBIFID: 5231418745; Occurrence Remarks: Abundant along lakeshore;; Coordinate Uncertainty in Meters: 11.00000.

GBIFID: 5198867164; Occurrence Remarks: A baby / very young snake? Found it living underneath a rock in a drainage with running water.;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 4039355301; Occurrence Remarks: Eating an earthworm;; Coordinate Uncertainty in Meters: 11.10000.

GBIFID: 1291109497; Occurrence Remarks: This individual only poked its head up for a few seconds before swimming along. it was identified by its location, the eight labial scales, and the yellow dorsal strip with dark borders visible in the water to the right of the snakes head.;; Coordinate Uncertainty in Meters: 32.00000.

GBIFID: 1305133921; Occurrence Remarks: Small, probably neonate, Thamnophis atratus hydrophilus on banks of Smith River (Del Norte County) near Gasquet. Came upon it on river bank and it regurgitated a meal of a frog (Rana sp.).;; Coordinate Uncertainty in Meters: 62159.00000.

GBIFID: 1453179642; Occurrence Remarks: perched in willow above water. Exceptionally blends in with tree colors. I have seen this species doing this often.;; Coordinate Uncertainty in Meters: 27754.00000.

GBIFID: 1453291158; Occurrence Remarks: Colin cradling the garter.;; Coordinate Uncertainty in Meters: 27537.00000.

GBIFID: 1453313351; Occurrence Remarks: Found along the Illinois River.;; Coordinate Uncertainty in Meters: 27661.00000.

GBIFID: 3320910382; Occurrence Remarks: Happily swam away from us;; Coordinate Uncertainty in Meters: 933.00000.

GBIFID: 3384270522; Occurrence Remarks: Three on log and one in water;; Coordinate Uncertainty in Meters: 12.00000.

GBIFID: 2851065728; Occurrence Remarks: The suggestions werenΓÇÖt great. IΓÇÖm figuring itΓÇÖs some type of racer;; Coordinate Uncertainty in Meters: 270.00000.

GBIFID: 3355072412; Occurrence Remarks: Babies EVERYWHERE!!;; Coordinate Uncertainty in Meters: 6.00000.

GBIFID: 2850742206; Occurrence Remarks: Tiny snake 10-12ö long swimming in pond near river. Small prey in mouth looks like tadpole.;; Coordinate Uncertainty in Meters: 19.00000.

GBIFID: 2862392393; Occurrence Remarks: Did not appear to have the strongly visible stripe that I thought a garter snake would have, though I dont know much about snakes.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 1572350204; Occurrence Remarks: Along the middle fork.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 1572350224; Occurrence Remarks: Along the middle fork.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 1572369844; Occurrence Remarks: About 40 cm total length. Saw on gravel road and stopped to look. 8-9 upper labials, anteriorly pointed internasals, and typical pattern.;; Coordinate Uncertainty in Meters: 3.00000.

GBIFID: 1572373663; Occurrence Remarks: The first of several similarly small-sized Aquatic Garter Snakes located on a cobbley/sandy beach area on the opposite bank of the creek from Cow Creek Rd.;; Coordinate Uncertainty in Meters: 31.00000.

GBIFID: 1572373554; Occurrence Remarks: The second of several similarly small-sized Aquatic Garter Snakes located on a cobbley/sandy beach area on the opposite bank of the creek from Cow Creek Rd.;; Coordinate Uncertainty in Meters: 31.00000.

GBIFID: 2423256762; Occurrence Remarks: One of 3 or more small Aquatic Garters on this cobbley/sandy beach.;; Coordinate Uncertainty in Meters: 15.00000.

GBIFID: 1572376296; Occurrence Remarks: One of 3 or more small Aquatic Garters on this cobbley/sandy beach. Videos here: https://youtu.be/QVfj_i0AHqE https://youtu.be/_WTsUwHQcVU;; Coordinate Uncertainty in Meters: 15.00000.

GBIFID: 1572394686; Occurrence Remarks: Hunting for fish.;; Coordinate Uncertainty in Meters: 27816.00000.

GBIFID: 3355282305; Occurrence Remarks: adult;; Coordinate Uncertainty in Meters: 8.00000.

GBIFID: 1586118460; Occurrence Remarks: There were at least three of these small garter snakes in the general area. This is the only one that I caught. The others I just photographed with my Canon camera and did not attempt to capture.;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 1677304300; Occurrence Remarks: Juvenile found at the confluence of Grave Creek and the Rogue River;; Coordinate Uncertainty in Meters: 65.00000.

GBIFID: 3330410514; Occurrence Remarks: Absent stripes, checkered pattern, like a gopher snake;; Coordinate Uncertainty in Meters: 49.00000.

GBIFID: 3456383075; Occurrence Remarks: Garter snake swimming in the river. Photo taken by my brother.;; Coordinate Uncertainty in Meters: 24.00000.

GBIFID: 3385104874; Occurrence Remarks: on the bare rock along the river near the trail bridge;; Coordinate Uncertainty in Meters: 99.00000.

Jackson, Oregon: 42.19592, -122.715605: : 7/7/2026: schubedube: 7 Jul 2026 ; Coordinate Uncertainty in Meters: 3.00000.

Occurrence Remarks: Found in the watery rocks on the bank of the Smith river; Coordinate Uncertainty in Meters: 11.10000.

Occurrence Remarks: Found in wet rocks on bank of Smith river; Coordinate Uncertainty in Meters: 0.11000.

Humboldt, California: 40.855711, -123.988756: : 9/6/2025: ren pedersen: 6 Sep 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Humboldt, California: 40.981729, -123.627188: : 8/22/2025: Cedrik von Briel: 22 Aug 2025 ; Coordinate Uncertainty in Meters: 27877.00000.

Occurrence Remarks: Found in stream bed; Coordinate Uncertainty in Meters: 300.00000.

Humboldt, California: 40.282847, -123.748881: : 9/10/2025: Eel River Estuary Preserve: 10 Sep 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Humboldt, California: 41.208472, -124.010208: : 9/13/2025: Shelby Tkacik: 13 Sep 2025 ; Coordinate Uncertainty in Meters: 11.00000.

Humboldt, California: 40.85606, -123.988473: : 4/22/2026: qp3: 22 Apr 2026 ; Coordinate Uncertainty in Meters: 1.11000.

Humboldt, California: 40.267029, -123.848342: : 9/1/2025: C. McKim: 1 Sep 2025 ; Coordinate Uncertainty in Meters: 134.00000.

Humboldt, California: 40.830945, -123.973367: : 4/7/2026: Soren: 7 Apr 2026 ; Coordinate Uncertainty in Meters: 16.00000.