INATURALIST Observations 179262658
Mezquital, Durango: 22.916919, -104.27109: : 8/5/2019: Chris Gruenwald Herp.mx: 5 Aug 2019 ; Coordinate Uncertainty in Meters: 6398.00000.

INATURALIST Observations 81803469
Mezquital, Durango: 22.986555, -104.676522: : 6/23/2016: Alonso G.A.: 23 Jun 2016 ; Coordinate Uncertainty in Meters: 15.00000.

INATURALIST Observations 29385535
Suchil, Durango: 23.416693, -104.284972: : 7/11/2019: candecardenas: 11 Jul 2019 ; Coordinate Uncertainty in Meters: 4.00000.

Occurrence Remarks: Occurrence Remarks: PROREST/0640; Coordinate Uncertainty in Meters: 488.00000.

Canatlan, Durango: 24.490315, -104.93307: : 7/18/2024: Luis Fuentes Castillo: 18 Jul 2024 ; Coordinate Uncertainty in Meters: 7341.00000.

Occurrence Remarks: Ejido San Juan de Michis; Coordinate Uncertainty in Meters: 8.00000.

Otaez, Durango: 24.866014, -105.956913: : 6/18/2022: Richard S├ínchez: 18 Jun 2022 ; Coordinate Uncertainty in Meters: 4.00000.

Unknown, Durango: 25.145821, -105.605846: : 7/18/2026: Leonardo M. Mart├¡nez-Campos: 18 Jul 2026 ; Coordinate Uncertainty in Meters: 60906.00000.

Tepehuanes, Durango: 25.29392, -105.948938: : 11/17/2025: Abraham Garcia: 17 Nov 2025 ; Coordinate Uncertainty in Meters: 1.00000.

Tepehuanes, Durango: 25.293937, -105.948918: : 11/17/2025: Abraham Garcia: 17 Nov 2025 ; Coordinate Uncertainty in Meters: 1.00000.

Occurrence Remarks: This specimen was observed by Marco A. Gonzalez-Bernal & Edmi I. Rojas-Aguilar. This record was deposited in the University of Texas, Arlington Digital Collection under number UTADC 9818. This record was published in the Bulletin of the Chicago Herpetological Society 58(6).; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: This specimen was observed by Marco A. Gonzalez-Bernal & Edmi I. Rojas-Aguilar. This record was deposited in the University of Texas, Arlington Digital Collection under number UTADC 9825. This record was published in the Bulletin of the Chicago Herpetological Society 58(6).; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: This specimen was observed by Marco A. Gonzalez-Bernal & Edmi I. Rojas-Aguilar. This record was deposited in the University of Texas, Arlington Digital Collection under number UTADC 9817. This record was published in the Bulletin of the Chicago Herpetological Society 58(6).; Coordinate Uncertainty in Meters: 0.11000.

Guadalupe y Calvo, Chihuahua: 25.700728, -106.959961: : 10/15/2020: Chris Gruenwald Herp.mx: 15 Oct 2020 :

Guadalupe y Calvo, Chihuahua: 25.72, -106.85: : 9/2/2022: Chris Gruenwald Herp.mx: 2 Sep 2022 :
Occurrence Remarks: This specimen was observed by Ricardo Ram├¡rez-Chaparro and Sebastian Ochoa-Rodr├¡guez. This record was deposited in the University of Texas, Arlington Digital Collection under number UTADC 9810. This record was published in the Bulletin of the Chicago Herpetological Society 58(6).; Coordinate Uncertainty in Meters: 1110.00000.

Guadalupe y Calvo, Chihuahua: 25.721306, -106.849693: : 9/19/2020: licepayan: 19 Sep 2020 ; Coordinate Uncertainty in Meters: 0.11000.

Suchil, Durango: 23.305365, -104.296186: : 8/6/2019: Chris Gruenwald Herp.mx: 6 Aug 2019 ; Coordinate Uncertainty in Meters: 30196.00000.

Guadalupe y Calvo, Chihuahua: 25.745494, -106.821251: : 8/13/2021: Chris Gruenwald Herp.mx: 13 Aug 2021 :

Guadalupe y Calvo, Chihuahua: 25.964059, -106.965753: : 7/30/2019: APFF Cerro Mohinora: 30 Jul 2019 :
Occurrence Remarks: Cascabel de cola negra NOM-059 Pr; Coordinate Uncertainty in Meters: 5.00000.

Guadalupe y Calvo, Chihuahua: 26.3984, -107.2672: : 9/19/2022: Chris Gruenwald Herp.mx: 19 Sep 2022 :
Occurrence Remarks: This specimen was observed by Ricardo Ram├¡rez-Chaparro. This record was deposited in the University of Texas, Arlington Digital Collection under number UTADC 9811. This record was published in the Bulletin of the Chicago Herpetological Society 58(6).; Coordinate Uncertainty in Meters: 11.10000.

Guadalupe y Calvo, Chihuahua: 26.3984, -107.2672: : 9/19/2022: Chris Gruenwald Herp.mx: 19 Sep 2022 :
Occurrence Remarks: This specimen was observed by Ricardo Ram├¡rez-Chaparro. This record was deposited in the University of Texas, Arlington Digital Collection under number UTADC 9812. This record was published in the Bulletin of the Chicago Herpetological Society 58(6).; Coordinate Uncertainty in Meters: 11.10000.

Guachochi, Chihuahua: 26.823872, -107.253919: : 4/18/2025: LUZ MARIA RODRIGUEZ LOPEZ: 18 Apr 2025 ; Coordinate Uncertainty in Meters: 1036.00000.

Pueblo Nuevo, Durango: 23.809485, -105.536667: : 9/8/2021: Pepe Santillan: 8 Sep 2021 ; Coordinate Uncertainty in Meters: 1984.00000.

Urique, Chihuahua: 27.59044, -107.81989: : 9/27/2014: Eric Centenero Alcal├í: 27 Sep 2014 ; Coordinate Uncertainty in Meters: 5000.00000.

Occurrence Remarks: Foto por Mario Astorga depositada en la CCV UACJ; Coordinate Uncertainty in Meters: 29704.00000.

Canatlan, Durango: 24.504354, -105.02358: : 10/18/2017: Eduardo G├ímez: 18 Oct 2017 ; Coordinate Uncertainty in Meters: 2789.00000.

Bocoyna, Chihuahua: 27.750548, -107.636889: : 2/16/2020: Regina Minjares: 16 Feb 2020 ; Coordinate Uncertainty in Meters: 4208.00000.

Guadalupe y Calvo, Chihuahua: 25.732287, -106.824586: : 9/19/2020: J. Fernando P├¡o Le├│n: 19 Sep 2020 ; Coordinate Uncertainty in Meters: 571.00000.

Bocoyna, Chihuahua: 27.73383, -107.43635: : 12/10/2013: Alejandro Sigala Ch├ívez: 10 Dec 2013 ; Coordinate Uncertainty in Meters: 244.00000.

Uruachi, Chihuahua: 28.010417, -108.281277: : 9/9/2023: Ram├│n Isaac Miramontes Cinco: 9 Sep 2023 ; Coordinate Uncertainty in Meters: 29656.00000.

Ocampo, Chihuahua: 28.036783, -108.149184: : 6/12/2025: LittleBlackCat: 12 Jun 2025 ; Coordinate Uncertainty in Meters: 29656.00000.

Occurrence Remarks: Young C. willardi silus found off a trail by my wife in mid-morning. When I caught up to where she was on the trail we took some photos and the snake retreated under a large boulder. This was our second silus in two days and both were very young snakes,; Coordinate Uncertainty in Meters: 29656.00000.

Ocampo, Chihuahua: 28.052253, -108.032374: : 6/12/2025: LittleBlackCat: 12 Jun 2025 ; Coordinate Uncertainty in Meters: 29656.00000.

Occurrence Remarks: @agatica; Coordinate Uncertainty in Meters: 29656.00000.

Unknown, Chihuahua: 28.118061, -108.240273: : 6/17/2026: Jos├⌐ Candelario Hern├índez Alvarez: 17 Jun 2026

Urique, Chihuahua: 27.327062, -108.104154: : 6/30/2018: Gerardo Ramos-Le├│n: 30 Jun 2018 ; Coordinate Uncertainty in Meters: 29751.00000.

Bocoyna, Chihuahua: 28.036045, -107.598543: : 8/12/2023: Oscar Mart├¡nez Galvan: 12 Aug 2023 ; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: Very small (neonate?) C. willardi silus found accidentally in the late evening outside the cabin I was staying in. I noticed the snake when I almost stepped on it and it moved. I took a phone picture then ran and got my camera and flash from the cabin and when I returned the snake was roughly in the same spot. My wife and I observed and photographed the snake for a few minutes, during which time it moved to the edge of a large boulder. We left the snake alone about an hour before sunset and when I checked the area close to sunset it was gone. This was my first C. willardi find ever and potentially the cutest snake Ive ever seen in the wild.; Coordinate Uncertainty in Meters: 29656.00000.

Ocampo, Chihuahua: 28.165283, -108.205965: : 9/14/2023: juanphdz: 14 Sep 2023 ; Coordinate Uncertainty in Meters: 20.00000.

Ocampo, Chihuahua: 28.159156, -108.205723: : 9/7/2025: Alejandra Pe├▒a Estrada: 7 Sep 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Unknown, Chihuahua: 28.224337, -108.407358: : 6/18/2026: babonoyabaadrian: 18 Jun 2026 ; Coordinate Uncertainty in Meters: 61.00000.

Ocampo, Chihuahua: 28.14658, -108.294628: : 6/13/2025: LittleBlackCat: 13 Jun 2025 ; Coordinate Uncertainty in Meters: 29656.00000.

Yecora, Sonora: 28.337133, -109.030258: : 8/7/2023: jorgeortizv: 7 Aug 2023 ; Coordinate Uncertainty in Meters: 0.11000.

Ocampo, Chihuahua: 28.159125, -108.205791: : 9/7/2025: luis angel leon santiba├▒ez: 7 Sep 2025 ; Coordinate Uncertainty in Meters: 8.00000.

Yecora, Sonora: 28.367724, -108.969559: : 8/27/2017: Gert Jan Verspui: 27 Aug 2017 ; Coordinate Uncertainty in Meters: 10158.00000.

Yecora, Sonora: 28.335209, -109.031891: : 8/7/2022: jorgeortizv: 7 Aug 2022 ; Coordinate Uncertainty in Meters: 0.11000.

Temosachic, Chihuahua: 28.547476, -108.005746: : 10/9/2008: Javier Cruz Nieto: 9 Oct 2008 ; Coordinate Uncertainty in Meters: 20.00000.

Madera, Chihuahua: 29.097437, -108.23624: : 9/2/2013: Javier Cruz Nieto: 2 Sep 2013 ; Coordinate Uncertainty in Meters: 15.00000.

Temosachic, Chihuahua: 28.737563, -108.227694: : 9/26/2025: otonielval: 26 Sep 2025 ; Coordinate Uncertainty in Meters: 1953.00000.

Madera, Chihuahua: 29.408206, -108.253785: : 7/21/2022: Javier Cruz Nieto: 21 Jul 2022 ; Coordinate Uncertainty in Meters: 31.00000.

Namiquipa, Chihuahua: 29.416479, -106.699763: : 8/16/2019: brandon_dietrich: 16 Aug 2019 ; Coordinate Uncertainty in Meters: 29483.00000.

Occurrence Remarks: A female collected in Arroyo Mesteno, a westward drainage in the northern massif of the Sierra del Nido. Collected by Dave Barker, then a keeper at the Dallas Zoo.; Coordinate Uncertainty in Meters: 2017.00000.

Occurrence Remarks: A male collected in Arroyo Mesteno, a westward drainage in the northern massif of the Sierra del Nido. Collected by Ardell Mitchell, then lead keeper of the Dallas Zoo Department of Herpetology.; Coordinate Uncertainty in Meters: 1643.00000.

Ignacio Zaragoza, Chihuahua: 29.550182, -107.516401: : 10/11/2020: Alejandro Colmenero: 11 Oct 2020 ; Coordinate Uncertainty in Meters: 0.11000.

Ignacio Zaragoza, Chihuahua: 29.644653, -107.760884: : 10/1/2015: kariigmz: 1 Oct 2015 ; Coordinate Uncertainty in Meters: 2799.00000.

Madera, Chihuahua: 29.094922, -108.23682: : 9/26/2021: Javier Cruz Nieto: 26 Sep 2021 ; Coordinate Uncertainty in Meters: 8.00000.

San Felipe de Jesus, Sonora: 29.838056, -110.384386: : 8/6/2019: Cecilia Aguilar M: 6 Aug 2019 ; Coordinate Uncertainty in Meters: 0.11000.

Aconchi, Sonora: 29.798213, -110.334053: : 11/4/2022: Oscar Leonardo Chavez Torres: 4 Nov 2022 ; Coordinate Uncertainty in Meters: 11.00000.

Madera, Chihuahua: 29.750881, -108.444015: : 8/8/2024: Abel guerrero: 8 Aug 2024 ; Coordinate Uncertainty in Meters: 29458.00000.

Nacori Chico, Sonora: 29.854769, -108.709925: : 8/7/2018: Ross Maynard: 7 Aug 2018 ; Coordinate Uncertainty in Meters: 7891.00000.

Occurrence Remarks: one of the most beautiful rattlesnakes; Coordinate Uncertainty in Meters: 0.11000.

Madera, Chihuahua: 29.967129, -108.362657: : 3/19/2008: Javier Cruz Nieto: 19 Mar 2008 ; Coordinate Uncertainty in Meters: 30.00000.

Casas Grandes, Chihuahua: 30.219927, -108.29925: : 11/22/2021: Ismael: 22 Nov 2021 ; Coordinate Uncertainty in Meters: 122.00000.

Nacozari de Garcia, Sonora: 30.253877, -109.533933: : 8/18/2017: Colectivo Sonora Silvestre: 18 Aug 2017 ; Coordinate Uncertainty in Meters: 1953.00000.

Nacozari de Garcia, Sonora: 30.28389, -109.56028: : 8/15/2017: Anays Blanco: 15 Aug 2017 ; Coordinate Uncertainty in Meters: 150.00000.

Nacozari de Garcia, Sonora: 30.363493, -109.681357: : 9/20/2017: estefania ramirez: 20 Sep 2017 ; Coordinate Uncertainty in Meters: 1575.00000.

Madera, Chihuahua: 29.332639, -108.158584: : 7/4/2014: Juan Diego Carrillo Contreras: 4 Jul 2014 :
Occurrence Remarks: Ejemplar encontrado en el santuario de la cotorra occidental durante un monitoreo de aves. El bulto en su cuerpo da a entender que se alimento momentos antes.; Coordinate Uncertainty in Meters: 29508.00000.

San Felipe de Jesus, Sonora: 29.838163, -110.383759: : 8/6/2019: Joey Santore: 6 Aug 2019 ; Coordinate Uncertainty in Meters: 0.11000.

Nacori Chico, Sonora: 29.844875, -108.72914: : 6/1/2021: valente_perez: 1 Jun 2021 ; Coordinate Uncertainty in Meters: 313.00000.

Agua Prieta, Sonora: 31.081731, -108.969464: : 8/19/2008: Jason K.: 19 Aug 2008 ; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 1847552881; Occurrence Remarks: Subadult male. This is only the second specimen of this species Ive encountered in the wild, despite years of field trips/biological surveys within the range of this uncommon and beautiful Rattlesnake. Observed within the general vicinity of Harshaw, AZ.;; Coordinate Uncertainty in Meters: 29252.00000.

Nacozari de Garcia, Sonora: 30.539722, -109.166111: : 6/24/2010: Carlos Gonzalez: 24 Jun 2010 ; Coordinate Uncertainty in Meters: 197.00000.

Occurrence Remarks: 3rd one of the day, and the largest by far. This one was near a rocky outcrop, coiled under a bush. Rained overnight and in the early morning before the observation.; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 3947134453;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 5037170980; Occurrence Remarks: Crappy iPhone 6 doc shot but hope thereÆs enough detail to confirm ID;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 1986532294; Occurrence Remarks: Scanned from slide... Month and year accurate - date is approximate. Specimen handled/photographed with permit...;; Coordinate Uncertainty in Meters: 29226.00000.

Occurrence Remarks:; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 3384362443;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 2460041302;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 1453206106; Occurrence Remarks: Arizona ridge-nosed rattlesnake, Crotalus w. willardi; Santa Cruz Co., AZ. 17 July 2013;; Coordinate Uncertainty in Meters: 29226.00000.

Agua Prieta, Sonora: 31.064235, -108.912826: : 9/29/2018: phhbrown: 29 Sep 2018 ; Coordinate Uncertainty in Meters: 29278.00000.

Cananea, Sonora: 30.990969, -109.997657: : 8/26/2014: Diego Barrales: 26 Aug 2014 ; Coordinate Uncertainty in Meters: 29304.00000.

Santa Cruz, Arizona: 31.417811, -110.555395: : 9/13/2025: Sean Hartnett: 13 Sep 2025 ; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 2269306903; Occurrence Remarks: On the crawl;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 2609100918; Occurrence Remarks: Second of two seen within 6 feet of the first. Had a large meal in its stomach.;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 2269313904; Occurrence Remarks: On the crawl;; Coordinate Uncertainty in Meters: 29226.00000.

Santa Cruz, Arizona: 31.428351, -110.496143: : 8/10/2025: herphendrie: 10 Aug 2025 ; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 4162493257; Occurrence Remarks: willie nice to meet you sir first snake IÆve ever found!! My cutie boyf @reptijake always sees them before me and has to point them out to me for like 5 minutes before my horrible eyes can see them. IÆm completely renouncing my name and from this moment on shall forever be known as reptides, tiny herper extraordinaire ù a near-sighted and far-sighted champion amongst reptile and man. HELL YEAH BROTHERRR!!!! 89░;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 1265549185; Occurrence Remarks: Arizona Ridgenosed Rattlesnake from the Huachuca Mountains. Cochise County, Arizona;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 2283070141; Occurrence Remarks: 2010 Southeast Arizona Herping Trip;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 4407198134; Occurrence Remarks: In dry streambed about 2 km up-canyon from Ramsey Canyon Preserve buildings (at the time, called the Mile High).;; Coordinate Uncertainty in Meters: 29226.00000.

Occurrence Remarks: Occurrence Remarks: LIFER! Oddly enough this was my first ever snake Ive seen in AZ and my first ever rattlesnake!; Coordinate Uncertainty in Meters: 29199.00000.

Occurrence Remarks: Occurrence Remarks: This guy was sitting on a fallen log, and I only noticed him once I spooked him, and he fell off and started crawling under it.; Coordinate Uncertainty in Meters: 29199.00000.

Occurrence Remarks: Occurrence Remarks: Pulled up on Yinan (@diomedea_exulans_li) finding this gorgeous willi, all credit goes to him for the find; Coordinate Uncertainty in Meters: 29226.00000.

Occurrence Remarks: Occurrence Remarks: 2nd one found this day; Coordinate Uncertainty in Meters: 29226.00000.

Occurrence Remarks: Occurrence Remarks: 74F; Coordinate Uncertainty in Meters: 29226.00000.

Santa Cruz, Arizona: 31.648959, -110.924281: : 10/7/2025: austinrice: 7 Oct 2025 ; Coordinate Uncertainty in Meters: 29199.00000.

Occurrence Remarks: 2nd one of the day. Subadult, relatively brightly colored, more brightly colored than the images indicate. Seen on the crawl near the base of a dead oak. Rained overnight and in the early morning before the observation. The last photo shows the area that it was seen originally.; Coordinate Uncertainty in Meters: 29226.00000.

Occurrence Remarks: My first ridgenose, finally after so many hours looking for this species over three years. 1 of 3 seen today in this area. Was on the crawl near the base of an oak tree. Rained overnight and in the early morning before the observation. Last photo is not in-situ, but shows the snake in habitat as it was leaving.; Coordinate Uncertainty in Meters: 29226.00000.

Occurrence Remarks: Baby from last year. Found out on the crawl in an open, rocky patch of habitat (photo 5). An afternoon rain storm had just hit the area around 30-45 minutes prior to the observation.; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 1883955076; Occurrence Remarks: Small juvenile coiled up against fallen log on shaded canyon side.;; Coordinate Uncertainty in Meters: 29226.00000.

Occurrence Remarks: Appears to be a juvenile; Coordinate Uncertainty in Meters: 29199.00000.

Santa Cruz, Arizona: 31.460217, -110.468344: : 8/10/2025: herphendrie: 10 Aug 2025 ; Coordinate Uncertainty in Meters: 29226.00000.

Occurrence Remarks: Male; Coordinate Uncertainty in Meters: 29226.00000.

Santa Cruz, Arizona: 31.463191, -110.595019: : 6/18/2026: Jason Guo Θâ¡τ┤½σ«╕: 18 Jun 2026 ; Coordinate Uncertainty in Meters: 29226.00000.

Occurrence Remarks: Lifer little ridge nose ( ┬┤Γùö ΓÇ╕Γùö`) My lifer and also the AZ state snake; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 3859215747; Occurrence Remarks: Approximately 10 to 12 inches long. Madera Canyon, Carrie Nation Trail.;; Coordinate Uncertainty in Meters: 29199.00000.

Santa Cruz, Arizona: 31.534593, -110.515161: : 3/30/2026: Mason Salem: 30 Mar 2026 ; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 3902400108; Occurrence Remarks: Carrie Nation Trail, Madera Canyon, SE AZ, 18 Aug 2016;; Coordinate Uncertainty in Meters: 29199.00000.

GBIFID: 1899782859; Occurrence Remarks: Newborn photographed and left in situ;; Coordinate Uncertainty in Meters: 29199.00000.

GBIFID: 3994207805; Occurrence Remarks: I looked for this species for years. Raymond Van Buskirk, then quite young, spotted it.;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 4400416105; Occurrence Remarks: Very dark individual 73F, high, thin overcast. Rain last night; sitting next to a clump of grass;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 4400237943; Occurrence Remarks: 5 neonates on the surface sunning themselves! Four bolted under a rock we managed a picture of one and let it crawl under the rock with its siblings...cool!;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 4431246640; Occurrence Remarks: Small, appx 12;; Coordinate Uncertainty in Meters: 29199.00000.

GBIFID: 1986528185; Occurrence Remarks: Scanned from slide... month and year accurate, date approximate...;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 1986532288; Occurrence Remarks: Scanned from slide... Month and year accurate - date is approximate. Specimen handled/photographed with permit...;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 1986532723; Occurrence Remarks: Scanned from slide... Month and year accurate - date is approximate. Specimen handled/photographed with permit...;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 4431035795; Occurrence Remarks: Lifer snake, and a stunner at that! Highlight of my day odonating with Jack.;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 2006085667; Occurrence Remarks: Poor grabs from an old video.;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 4911049164; Occurrence Remarks: Second one of the night;; Coordinate Uncertainty in Meters: 29199.00000.

GBIFID: 4919562966; Occurrence Remarks: First one of the night;; Coordinate Uncertainty in Meters: 29199.00000.

GBIFID: 4945851484; Occurrence Remarks: Very cute neonate flipped after rain!;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 4946683714; Occurrence Remarks: This was the 2nd of two neonate willardi found on the same hillside - this one, within 100 yards of the first. Siblings perhaps? Note that this was the same hillside as the gravid adult female from one month prior (see my other observation below - https://www.inaturalist.org/observations/234643496 );; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 4946682454; Occurrence Remarks: This was the first of two neonate willardi found on the same hillside. Note that the last photo was shot with my long lens after the snake crawled off and hid behind the clump of bunch grass. I watched from a distance for a while, but it simply stayed in place and I left it to its hunting. There were many, many juvenile Yarrows Spiny Lizards in the area.;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 4987722572; Occurrence Remarks: Tiny baby. Appx 6 long. Tail has not developed a rattle yet.;; Coordinate Uncertainty in Meters: 29199.00000.

GBIFID: 5140750274; Occurrence Remarks: It tried to rattle but didnt appear to really have a rattle.;; Coordinate Uncertainty in Meters: 29199.00000.

GBIFID: 5230506469; Occurrence Remarks: Found on the crawl Early morning After some good rain systems;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 5216374229; Occurrence Remarks: Comically obscene food bolus;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 2429518994; Occurrence Remarks: Hit by border patrol IÆm pretty sure. Huge bummer finding these DOR.;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 2574263952; Occurrence Remarks: A 1967 snapshot in time, back before species protection and the TNC preserve. Per Kauffeld-inspired reverential respect, we carefully photographed and released these two specimens---which were found within 100 feet of each other. Golden memories....;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 2609270270; Occurrence Remarks: Pair found together by my dog.;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 2609165865; Occurrence Remarks: First of two seen within 6 feet of the second.;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 2609194521; Occurrence Remarks: Found two animals together.;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 1273844603; Occurrence Remarks: Small rattlesnake, light tan in color with cross bars on back. Sharply contrasting brown and white markings on face.;; Coordinate Uncertainty in Meters: 29199.00000.

GBIFID: 3068109471; Occurrence Remarks: This is the first known specimen of ridgenose rattlesnake from the Peloncillo Mtns. This snake was given to me by NM Game and Fish, as I was studying obscurus on a grant from them at the time. This was a gravid female that delivered six offspring some months after capture.;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 3039423884; Occurrence Remarks: I like the high contrast face on this one.;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 1038288865; Occurrence Remarks: Photo courtesy of Erik McCormick;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 1038289205; Occurrence Remarks: Looks like a very gravid female.;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 3113379345; Occurrence Remarks: one of two found within a meter of each other;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 1703233958; Occurrence Remarks: Beautiful large adult found right before rain.;; Coordinate Uncertainty in Meters: 29199.00000.

GBIFID: 3337785488; Occurrence Remarks: up and down carrie nation cause of much excitement up there;; Coordinate Uncertainty in Meters: 29199.00000.

Santa Cruz, Arizona: 31.464785, -110.596728: : 8/23/2025: John Seal: 23 Aug 2025 ; Coordinate Uncertainty in Meters: 29226.00000.

Santa Cruz, Arizona: 31.624384, -110.995087: : 8/10/2025: herphendrie: 10 Aug 2025 ; Coordinate Uncertainty in Meters: 29199.00000.

Cochise, Arizona: 31.443647, -110.247397: : 9/1/2025: Yasuhiko Komatsu: 1 Sep 2025 ; Coordinate Uncertainty in Meters: 29226.00000.

Santa Cruz, Arizona: 31.555794, -110.478735: : 8/29/2025: Mark Otnes: 29 Aug 2025 ; Coordinate Uncertainty in Meters: 29226.00000.