INATURALIST Observations 185309128
Saltillo, Coahuila: 25.465877, -101.023653: : 9/28/2023: macro_biologist: 28 Sep 2023 ; Coordinate Uncertainty in Meters: 31.00000.

INATURALIST Observations 253127505
General Cepeda, Coahuila: 25.509913, -101.320533: : 11/25/2024: Jorge Madrazo Fanti: 25 Nov 2024 ; Coordinate Uncertainty in Meters: 3.00000.

INATURALIST Observations 229529731
Ramos Arizpe, Coahuila: 25.54115, -100.948307: : 7/5/2024: Antonio Martinez Mart├¡nez: 5 Jul 2024 :
Occurrence Remarks: Capturado y liberado en la misma zona; Coordinate Uncertainty in Meters: 9161.00000.

Ramos Arizpe, Coahuila: 25.573852, -101.076585: : 7/15/2009: Jesus Gordolomi Butterball RC: 15 Jul 2009 ; Coordinate Uncertainty in Meters: 539.00000.

Ramos Arizpe, Coahuila: 25.573852, -101.076585: : 7/16/2009: Jesus Gordolomi Butterball RC: 16 Jul 2009 ; Coordinate Uncertainty in Meters: 539.00000.

Santa Catarina, Nuevo Leon: 25.60689, -100.657396: : 7/20/2024: Silvino Eduardo: 20 Jul 2024 ; Coordinate Uncertainty in Meters: 29936.00000.

Ramos Arizpe, Coahuila: 25.5831, -101.099498: : 8/6/2015: Eric Centenero Alcal├í: 6 Aug 2015 ; Coordinate Uncertainty in Meters: 5000.00000.

Santa Catarina, Nuevo Leon: 25.645147, -100.49105: : 11/15/2020: Capit├ín Barbanegra: 15 Nov 2020 ; Coordinate Uncertainty in Meters: 19.00000.

Ramos Arizpe, Coahuila: 25.542562, -101.051522: : 8/31/2020: Karla M. Ben├¡tez: 31 Aug 2020 ; Coordinate Uncertainty in Meters: 0.11000.

Santa Catarina, Nuevo Leon: 25.651589, -100.462367: : 9/23/2023: J. Fernando P├¡o Le├│n: 23 Sep 2023 ; Coordinate Uncertainty in Meters: 0.11000.

Ramos Arizpe, Coahuila: 25.538936, -101.078561: : 7/29/2016: Fernando Toledo y Ana Karen Fernandez: 29 Jul 2016 ; Coordinate Uncertainty in Meters: 0.11000.

Santa Catarina, Nuevo Leon: 25.629295, -100.687531: : 9/7/2025: jossgarcia1104: 7 Sep 2025 ; Coordinate Uncertainty in Meters: 913.00000.

Santa Catarina, Nuevo Leon: 25.684126, -100.638765: : 8/14/2020: Francisco Javier Jim├⌐nez Granados: 14 Aug 2020 ; Coordinate Uncertainty in Meters: 0.11000.

Santa Catarina, Nuevo Leon: 25.646756, -100.462113: : 9/13/2023: Dani: 13 Sep 2023 ; Coordinate Uncertainty in Meters: 34.00000.

Garcia, Nuevo Leon: 25.716466, -100.609101: : 9/18/2025: Mauricio L: 18 Sep 2025 ; Coordinate Uncertainty in Meters: 383.00000.

Garcia, Nuevo Leon: 25.720664, -100.608676: : 11/24/2025: Mauricio L: 24 Nov 2025 ; Coordinate Uncertainty in Meters: 119.00000.

Unknown, Nuevo Leon: 25.657888, -100.762453: : 4/25/2026: alexhermar: 25 Apr 2026 ; Coordinate Uncertainty in Meters: 3.00000.

Unknown, Nuevo Leon: 25.662542, -100.771638: : 4/25/2026: Nahomi Mendoza: 25 Apr 2026 ; Coordinate Uncertainty in Meters: 9984.00000.

Garcia, Nuevo Leon: 25.71578, -100.602598: : 6/27/2023: Mauricio L: 27 Jun 2023 ; Coordinate Uncertainty in Meters: 372.00000.

Occurrence Remarks: El ejemplar presento una longitud aproximada de 105-110cm.; Coordinate Uncertainty in Meters: 13048.00000.

Garcia, Nuevo Leon: 25.721237, -100.60873: : 7/23/2024: Mauricio L: 23 Jul 2024 ; Coordinate Uncertainty in Meters: 372.00000.

Unknown, Coahuila: 25.793011, -101.411507: : 6/8/2026: Ismael Carre├│n: 8 Jun 2026 ; Coordinate Uncertainty in Meters: 1153.00000.

Garcia, Nuevo Leon: 25.82471, -100.62067: : 9/28/2022: David Ernesto Cruz Sanchez: 28 Sep 2022 ; Coordinate Uncertainty in Meters: 1.11000.

Garcia, Nuevo Leon: 25.942478, -100.629078: : 5/22/2022: David Ernesto Cruz Sanchez: 22 May 2022 ; Coordinate Uncertainty in Meters: 0.11000.

Mina, Nuevo Leon: 25.98865, -100.60262: : 5/14/2023: Roberto Garc├¡a Barrios: 14 May 2023 ; Coordinate Uncertainty in Meters: 2765.00000.

Occurrence Remarks: With Michael Price, Chris Harrison and Ryan Blakley. Imaged only. GTS 2475.; Coordinate Uncertainty in Meters: 5.00000.

Mina, Nuevo Leon: 26.384003, -100.592488: : 10/22/2018: Iv├ín Trinidad Ahumada Carrillo: 22 Oct 2018 ; Coordinate Uncertainty in Meters: 55792.00000.

Occurrence Remarks: MIra @Manuelnevarez, esta era la que tenia olvidada.; Coordinate Uncertainty in Meters: 100.00000.

Ramos Arizpe, Coahuila: 26.006172, -100.98383: : 4/13/2013: Jos├⌐ G. Flores Ventura: 13 Apr 2013 ; Coordinate Uncertainty in Meters: 0.11000.

Cuatro Cienegas, Coahuila: 26.919383, -102.122589: : 7/29/2018: Chris Gruenwald Herp.mx: 29 Jul 2018 ; Coordinate Uncertainty in Meters: 12.00000.

Castanos, Coahuila: 26.645934, -101.562874: : 8/31/2015: Fernando Toledo y Ana Karen Fernandez: 31 Aug 2015 ; Coordinate Uncertainty in Meters: 91.00000.

Mina, Nuevo Leon: 26.660228, -100.79904: : 5/13/2023: payolebrel: 13 May 2023 ; Coordinate Uncertainty in Meters: 21.00000.

Cuatro Cienegas, Coahuila: 26.985216, -102.060936: : 9/24/2022: sarionions: 24 Sep 2022 ; Coordinate Uncertainty in Meters: 0.11000.

Ocampo, Coahuila: 27.216463, -102.589689: : 7/16/2024: H├⌐ctor Rembis: 16 Jul 2024 ; Coordinate Uncertainty in Meters: 58.00000.

Cuatro Cienegas, Coahuila: 27.014862, -102.070594: : 7/23/2021: Biol. Emmanuel C. Jim├⌐nez S├ínchez: 23 Jul 2021 ; Coordinate Uncertainty in Meters: 61.00000.

GBIFID: 4500791607; Occurrence Remarks: AOR. No idea how it got there. Obviously not native to this area. Appeared healthy and behaved normally.;; Coordinate Uncertainty in Meters: 31.00000.

Camargo, Chihuahua: 28.305354, -104.549407: : 9/6/2021: Leonardo Hern├índez Escudero: 6 Sep 2021 ; Coordinate Uncertainty in Meters: 244.00000.

Cuatro Cienegas, Coahuila: 27.056327, -102.226967: : 9/30/2012: H├⌐ctor Ortega Salas: 30 Sep 2012 ; Coordinate Uncertainty in Meters: 367.00000.

Camargo, Chihuahua: 27.664691, -104.322905: : 9/7/2022: Reserva Ecol├│gica Parquetexpress Kawi Ray├⌐nari: 7 Sep 2022 ; Coordinate Uncertainty in Meters: 29704.00000.

Camargo, Chihuahua: 27.689205, -104.370641: : 9/6/2022: Reserva Ecol├│gica Parquetexpress Kawi Ray├⌐nari: 6 Sep 2022 ; Coordinate Uncertainty in Meters: 29704.00000.

Ocampo, Coahuila: 28.404705, -102.583271: : 4/28/2020: Luis Fuentes Castillo: 28 Apr 2020 ; Coordinate Uncertainty in Meters: 578.00000.

Ocampo, Coahuila: 28.417974, -102.568892: : 7/27/2018: Luis Fuentes Castillo: 27 Jul 2018 ; Coordinate Uncertainty in Meters: 1169.00000.

Chihuahua, Chihuahua: 28.473652, -106.134888: : 3/21/2022: danna-lozano: 21 Mar 2022 ; Coordinate Uncertainty in Meters: 626122.00000.

Julimes, Chihuahua: 28.546637, -105.369998: : 5/30/2021: estebandido: 30 May 2021 ; Coordinate Uncertainty in Meters: 29607.00000.

Aquiles Serdan, Chihuahua: 28.607842, -105.86095: : 8/17/2023: Mariana Gonz├ílez Rosas: 17 Aug 2023 ; Coordinate Uncertainty in Meters: 11.00000.

Ocampo, Coahuila: 28.560042, -102.620961: : 7/8/2023: Luis Fuentes Castillo: 8 Jul 2023 ; Coordinate Uncertainty in Meters: 2576.00000.

Aquiles Serdan, Chihuahua: 28.58917, -105.891529: : 8/17/2023: angel_trres: 17 Aug 2023 ; Coordinate Uncertainty in Meters: 8897.00000.

Occurrence Remarks:; Coordinate Uncertainty in Meters: 1264.00000.

Aquiles Serdan, Chihuahua: 28.594617, -105.887578: : 10/12/2023: Minerva Crucmile: 12 Oct 2023 ; Coordinate Uncertainty in Meters: 199.00000.

Manuel Benavides, Chihuahua: 28.61522, -103.764019: : 6/21/2021: Javier Cruz Nieto: 21 Jun 2021 ; Coordinate Uncertainty in Meters: 1.11000.

San Buenaventura, Coahuila: 28.623892, -102.386963: : 10/4/2022: Jorge Trevi├▒o: 4 Oct 2022 ; Coordinate Uncertainty in Meters: 0.11000.

Manuel Benavides, Chihuahua: 28.819931, -103.538379: : 9/28/2018: Jos├⌐ Candelario Hern├índez Alvarez: 28 Sep 2018 ; Coordinate Uncertainty in Meters: 122.00000.

Ocampo, Coahuila: 28.845071, -102.609742: : 7/19/2023: alexespinosa: 19 Jul 2023 ; Coordinate Uncertainty in Meters: 10896.00000.

Chihuahua, Chihuahua: 28.933879, -106.387388: : 9/29/2021: psierraw: 29 Sep 2021 ; Coordinate Uncertainty in Meters: 8.00000.

Manuel Benavides, Chihuahua: 28.937333, -103.802691: : 11/13/2021: Javier Cruz Nieto: 13 Nov 2021 ; Coordinate Uncertainty in Meters: 4.00000.

Aldama, Chihuahua: 28.957675, -105.702982: : 8/16/2014: ric_ramirez: 16 Aug 2014 ; Coordinate Uncertainty in Meters: 61.00000.

GBIFID: 2235529346;; Coordinate Uncertainty in Meters: 3906.00000.

Occurrence Remarks:; Coordinate Uncertainty in Meters: 968.00000.

Aldama, Chihuahua: 28.911126, -105.256101: : 8/10/2024: Chris Lloyd: 10 Aug 2024 ; Coordinate Uncertainty in Meters: 0.11000.

Acuna, Coahuila: 29.008322, -102.023449: : 5/16/2003: juliocarrera: 16 May 2003 ; Coordinate Uncertainty in Meters: 488.00000.

Ocampo, Coahuila: 29.077527, -102.819473: : 5/14/2013: Favian Flores Medina: 14 May 2013 ; Coordinate Uncertainty in Meters: 488.00000.

Occurrence Remarks: Crotalus posada a la orilla del camino. Rancho Pilares; Coordinate Uncertainty in Meters: 199.00000.

GBIFID: 1453183704;; Coordinate Uncertainty in Meters: 70146.00000.

Manuel Benavides, Chihuahua: 29.094871, -103.835159: : 9/14/2019: Jos├⌐ Candelario Hern├índez Alvarez: 14 Sep 2019 ; Coordinate Uncertainty in Meters: 15.00000.

GBIFID: 1453286266;; Coordinate Uncertainty in Meters: 11280.00000.

Brewster, Texas: 29.297777, -103.229855: : 10/13/2025: ashtonaraiza: 13 Oct 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: DOR adult male. 79 degrees F. With Doug Beckwith.; Coordinate Uncertainty in Meters: 4.00000.

Manuel Benavides, Chihuahua: 29.101153, -103.894526: : 2/21/2006: j_julianchrysaetos: 21 Feb 2006 ; Coordinate Uncertainty in Meters: 8.00000.

Manuel Benavides, Chihuahua: 29.153745, -104.102141: : 8/11/2014: Jos├⌐ Candelario Hern├índez Alvarez: 11 Aug 2014 ; Coordinate Uncertainty in Meters: 31.00000.

Brewster, Texas: 29.201991, -102.973883: : 4/2/2026: Michael Price: 2 Apr 2026 ; Coordinate Uncertainty in Meters: 4.00000.

Coyame del Sotol, Chihuahua: 29.308109, -104.707834: : 7/16/2015: Travis Dimler: 16 Jul 2015 ; Coordinate Uncertainty in Meters: 108839.00000.

Brewster, Texas: 29.248542, -103.30012: : 5/29/2026: gsexauer: 29 May 2026 ; Coordinate Uncertainty in Meters: 8.00000.

GBIFID: 891099306; Occurrence Remarks: Caught this Black-tailed Rattlesnake at night on a road in Big Bend back in August 1980. Snake was released after photos.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 1098911147; Occurrence Remarks: Dor;; Coordinate Uncertainty in Meters: 29508.00000.

Brewster, Texas: 29.299869, -103.185242: : 4/3/2026: Michael Price: 3 Apr 2026 ; Coordinate Uncertainty in Meters: 9.00000.

Brewster, Texas: 29.270658, -103.301728: : 4/26/2026: mocharlie: 26 Apr 2026 ; Coordinate Uncertainty in Meters: 3.00000.

GBIFID: 3760185343; Occurrence Remarks: id from ranger station;; Coordinate Uncertainty in Meters: 299.00000.

Brewster, Texas: 29.201984, -102.973907: : 4/2/2026: Mothington: 2 Apr 2026 ; Coordinate Uncertainty in Meters: 9.00000.

Brewster, Texas: 29.202325, -102.978097: : 11/21/2025: Katherine Lentz: 21 Nov 2025 ; Coordinate Uncertainty in Meters: 21.00000.

GBIFID: 1883505012; Occurrence Remarks: Eyes blue, probably about to shed.;; Coordinate Uncertainty in Meters: 177.00000.

Brewster, Texas: 29.202109, -102.98018: : 11/21/2025: Mothington: 21 Nov 2025 ; Coordinate Uncertainty in Meters: 716.00000.

GBIFID: 5198955368; Occurrence Remarks: Big Bend National Park;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 1453057437; Occurrence Remarks: On main road east of Panther Junction.;; Coordinate Uncertainty in Meters: 1.11000.

GBIFID: 1913203460; Occurrence Remarks: AOR;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 4399898590; Occurrence Remarks: Rattle snake on Lost Mine trail in the Chisos in Big Bend NP, TX;; Coordinate Uncertainty in Meters: 122.00000.

GBIFID: 1913201724; Occurrence Remarks: AOR;; Coordinate Uncertainty in Meters: 2.00000.

GBIFID: 4416648025; Occurrence Remarks: AOR;; Coordinate Uncertainty in Meters: 8.00000.

GBIFID: 4420772641; Occurrence Remarks: Scanning some old prints from miscellaneous travels. Some of these prints are significantly faded; IÆve done my best to restore natural colors. If Im remembering correctly, this was my Lifer Black-tailed Rattlesnake. Id stepped over a log (2nd image) to look at a bird and the rattlesnake--classic case--was partially hidden just behind the log. No harm, no foul.;; Coordinate Uncertainty in Meters: 100.00000.

GBIFID: 4936090256; Occurrence Remarks: On the Lost Mine Trail.;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 2273325826; Occurrence Remarks: Window Trail, Chisos Basin, Big Bend National Park, Brewster Co. Tx.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 891720393; Occurrence Remarks: Quantity= 1, County was Presidio County, Coordinates Derived from GPS using WGS84 datum, Observation was DOR, Specimen age Adult, , Sex Female, Elevation (ft): 0, Moon Phase: New Moon, Sky Condition unknown, Air Temp (F): unknown, Surface Temp (F): unknown, Pressure (in Hg): unknown, Relative Humidity (percent): unknown, Habitat Desert Highway, Search Time (minutes): 214, Found less than 100 feet from a river. Salvaged under permit from TPWD., other observers: Michael Price.;; Coordinate Uncertainty in Meters: 10.00000.

GBIFID: 891736622; Occurrence Remarks: While driving the road for herps;; Coordinate Uncertainty in Meters: 67336.00000.

GBIFID: 891723248; Occurrence Remarks: D.O.R;; Coordinate Uncertainty in Meters: 10.00000.

GBIFID: 2294641054; Occurrence Remarks: Big Bend National Park, The Basin, Brewster County Texas;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 1272086068; Occurrence Remarks: This individual was sitting in the middle of the road into the Chisos Basin in Big Bend National Park. We encouraged it to get off the road to a safer location. Given the milky appearance of the eye it may have been ready to molt.;; Coordinate Uncertainty in Meters: 100.00000.

GBIFID: 1306588083; Occurrence Remarks: Probably the largest Black-tailed I had ever seen; probably about 3-1/2 to 4 ft long and filled with a recent meal.;; Coordinate Uncertainty in Meters: 500.00000.

GBIFID: 1306581400; Occurrence Remarks: DOR;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 1455572780; Occurrence Remarks: This was our 2nd E. Black-tailed of the day.;; Coordinate Uncertainty in Meters: 199.00000.

GBIFID: 1453332985; Occurrence Remarks: Glenn Springs Rd;; Coordinate Uncertainty in Meters: 606.00000.

GBIFID: 1586100902; Occurrence Remarks: On the lost mine trail at big bend national park;; Coordinate Uncertainty in Meters: 30011.00000.

GBIFID: 923913704; Occurrence Remarks: Crotalus molossus molossus;; Coordinate Uncertainty in Meters: 20.00000.

GBIFID: 3391500199; Occurrence Remarks: Described as ôplatinumö by local herpetologist referring the the color of the scales. Found near Santa Elena Canyon. @mickeydylan;; Coordinate Uncertainty in Meters: 1285.00000.

Brewster, Texas: 29.186113, -102.970695: : 8/19/2025: Katherine Lentz: 19 Aug 2025 ; Coordinate Uncertainty in Meters: 3.00000.

Ocampo, Coahuila: 29.208825, -102.88938: : 10/7/2020: Nick Loveland: 7 Oct 2020 ; Coordinate Uncertainty in Meters: 64.00000.

Manuel Benavides, Texas: 29.207425, -103.946057: : 8/30/2025: colanegra: 30 Aug 2025 ; Coordinate Uncertainty in Meters: 29508.00000.

Manuel Benavides, Texas: 29.247843, -103.85703: : 8/30/2025: colanegra: 30 Aug 2025 ; Coordinate Uncertainty in Meters: 29508.00000.

Manuel Benavides, Chihuahua: 29.15759, -104.113682: : 10/9/2020: Jos├⌐ Candelario Hern├índez Alvarez: 9 Oct 2020 ; Coordinate Uncertainty in Meters: 8.00000.

Manuel Benavides, Texas: 29.263573, -103.916171: : 9/3/2016: colanegra: 3 Sep 2016 ; Coordinate Uncertainty in Meters: 29508.00000.

Brewster, Texas: 29.27054, -103.301518: : 7/16/2026: mountainlionwoman: 16 Jul 2026 ; Coordinate Uncertainty in Meters: 192.00000.

Aldama, Chihuahua: 29.167966, -105.447807: : 7/3/2015: ric_ramirez: 3 Jul 2015 ; Coordinate Uncertainty in Meters: 488.00000.

Ojinaga, Texas: 29.243491, -103.988482: : 9/4/2008: Robert Dobbs: 4 Sep 2008 ; Coordinate Uncertainty in Meters: 29508.00000.

Brewster, Texas: 29.270412, -103.300432: : 7/15/2026: mountainlionwoman: 15 Jul 2026 ; Coordinate Uncertainty in Meters: 198.00000.

Manuel Benavides, Chihuahua: 29.184404, -103.705243: : 4/17/2017: Jos├⌐ Candelario Hern├índez Alvarez: 17 Apr 2017 ; Coordinate Uncertainty in Meters: 61.00000.

Occurrence Remarks:; Coordinate Uncertainty in Meters: 3.00000.

Manuel Benavides, Texas: 29.280257, -103.946213: : 5/23/2023: Bryan Box: 23 May 2023 ; Coordinate Uncertainty in Meters: 29508.00000.

Occurrence Remarks: Large juvenile. With Doug Beckwith.; Coordinate Uncertainty in Meters: 4.00000.

Aldama, Chihuahua: 29.128058, -106.067514: : 6/14/2023: Luis Enrique Vega: 14 Jun 2023 ; Coordinate Uncertainty in Meters: 0.11000.

Brewster, Texas: 29.432295, -103.418676: : 8/30/2025: Ally Boville: 30 Aug 2025 ; Coordinate Uncertainty in Meters: 29483.00000.

Brewster, Texas: 29.320013, -103.25573: : 10/18/2025: dosterhaus: 18 Oct 2025 ; Coordinate Uncertainty in Meters: 76.00000.

Bandera, Texas: 29.752628, -98.915703: : 9/12/2025: explorewithwill: 12 Sep 2025 ; Coordinate Uncertainty in Meters: 6.00000.

Occurrence Remarks: Getting escorted by a roadrunner! Sighting by maintenance staff.; Coordinate Uncertainty in Meters: 29483.00000.

Comal, Texas: 29.759505, -98.142457: : 10/26/2025: Michael Pfeuffer: 26 Oct 2025 ; Coordinate Uncertainty in Meters: 195.00000.

GBIFID: 1913680966; Occurrence Remarks: DOR;; Coordinate Uncertainty in Meters: 5.00000.

Brewster, Texas: 29.321686, -103.407828: : 9/28/2025: Tom Obrien and Cindi: 28 Sep 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Brewster, Texas: 29.377874, -103.233505: : 3/11/2026: rileysmith6myuntedu: 11 Mar 2026 ; Coordinate Uncertainty in Meters: 65679.00000.

GBIFID: 1098910733; Occurrence Remarks: Large female;; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: Observed by contractors on their way to do biological surveys in a remote area of GCSNA.; Coordinate Uncertainty in Meters: 29483.00000.

Presidio, Texas: 29.845517, -104.61144: : 4/30/2026: jugbayjs: 30 Apr 2026 ; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: DOR; Coordinate Uncertainty in Meters: 15.00000.

Brewster, Texas: 29.553385, -102.944379: : 4/29/2026: Jon McIntyre: 29 Apr 2026 ; Coordinate Uncertainty in Meters: 2.00000.

Occurrence Remarks: @gtsalmon Olmos creek area San Antonio; Coordinate Uncertainty in Meters: 29483.00000.

Brewster, Texas: 29.553429, -102.944421: : 4/29/2026: jugbayjs: 29 Apr 2026 ; Coordinate Uncertainty in Meters: 4.00000.

Bexar, Texas: 29.589178, -98.708462: : 5/5/2026: Abby Ryan: 5 May 2026 ; Coordinate Uncertainty in Meters: 57.00000.

Occurrence Remarks: Observed by park ranger Justin and made it safely off the road! Unusual in the frontcountry part of GCSNA. Edit: Same snake crossed the road in the same spot later that evening! Reported by assistant superintendent Tyler.; Coordinate Uncertainty in Meters: 1.00000.

Brewster, Texas: 29.654405, -103.173831: : 4/1/2026: Michael Price: 1 Apr 2026 ; Coordinate Uncertainty in Meters: 8.00000.

Brewster, Texas: 29.319559, -103.213558: : 9/17/2025: Thomas Athens: 17 Sep 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: Just inside a cave entrance, very calm and just crawled away slowly into a crack. Cave location obscured and not accessible to the public.; Coordinate Uncertainty in Meters: 29483.00000.

Brewster, Texas: 29.553779, -102.944843: : 9/27/2025: Tom Obrien and Cindi: 27 Sep 2025 ; Coordinate Uncertainty in Meters: 2.00000.

Occurrence Remarks: With TPWD staff biologists. Also reported by Michael Price. See: https://www.inaturalist.org/observations/371707656; Coordinate Uncertainty in Meters: 3.00000.

Occurrence Remarks: Elephant Mountain WMA Inventory Survey.; Coordinate Uncertainty in Meters: 29407.00000.

Occurrence Remarks: Ive NEVER had the opportunity to meet a rattlesnake in all my years and my first one is a black tailΓÇª about 3 feet long, gave me a rattle as I looked down and they slithered away from me. definitely made my whole body shake from both a primal fear but also excitement and adoration! such a beautiful and powerful looking snake!; Coordinate Uncertainty in Meters: 29458.00000.

Bexar, Texas: 29.578974, -98.781496: : 9/8/2025: orangewhale: 8 Sep 2025 ; Coordinate Uncertainty in Meters: 4.00000.

Brewster, Texas: 29.685908, -103.165414: : 10/8/2025: Tom Obrien and Cindi: 8 Oct 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Brewster, Texas: 29.850039, -103.239961: : 10/9/2025: Tom Obrien and Cindi: 9 Oct 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: Very chill young one and Crazy mum (α╣æ┬┤πàü`); Coordinate Uncertainty in Meters: 29483.00000.

Brewster, Texas: 30.045445, -103.532792: : 6/24/2026: Katie Raney: 24 Jun 2026 ; Coordinate Uncertainty in Meters: 1166.00000.

Brewster, Texas: 29.335621, -103.234796: : 6/30/2026: Mothington: 30 Jun 2026 ; Coordinate Uncertainty in Meters: 547.00000.

GBIFID: 1052595826; Occurrence Remarks: young snake, probably just ate a Peromyscus-sized rodent;; Coordinate Uncertainty in Meters: 29483.00000.

GBIFID: 4937132644; Occurrence Remarks: AOR old adult male on FM 2627. Imaged only. GTS 801. UTA DC 7428-29. Map point is approximate.;; Coordinate Uncertainty in Meters: 28.00000.

GBIFID: 1042813805; Occurrence Remarks: Gray body with brown and yellow blotches down the back.;; Coordinate Uncertainty in Meters: 460.00000.

GBIFID: 4936842930; Occurrence Remarks: AOR on Hwy 118 S of Alpine, Texas. Imaged only. GTS 449. UTA DC 7216.;; Coordinate Uncertainty in Meters: 28.00000.

GBIFID: 1848767469; Occurrence Remarks: Kendall County, TX Found & photographed by the geology team survey;; Coordinate Uncertainty in Meters: 29458.00000.

GBIFID: 3947799329; Occurrence Remarks: DOR;; Coordinate Uncertainty in Meters: 2.00000.

GBIFID: 3963664971; Occurrence Remarks: I think this is what it is. See other photos-someone ran over it.;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 4076291740; Occurrence Remarks: Relocated;; Coordinate Uncertainty in Meters: 23.00000.

GBIFID: 1134964008; Occurrence Remarks: DOR adult ; elevation 2844.49 feet; moon waning crescent; sky condition clear; pressure 29.81 inHg; humidity 56 percent. Tail had been cut off. Snake was still moving when found. Salvaged under permit and deposited in Texas Natural History Collections at University of Texas--Austin.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 4034621770; Occurrence Remarks: Slithered across trail in front of us on hike. Did not rattle, just curled up under creosote and watched us.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 1913701642; Occurrence Remarks: Dor;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 4416840191; Occurrence Remarks: What a wonderful time I had with fellow TPWD folks at a staff meeting this week! Had a really cool opportunity to do some black-lighting with Ross and others at Albert and Bessie Kronkosky State Natural Area. Didnt stay out too long (so dry!), but a few cool things did show up.;; Coordinate Uncertainty in Meters: 2.00000.

GBIFID: 1944400541; Occurrence Remarks: On the highway in Black Gap WMA;; Coordinate Uncertainty in Meters: 147.00000.

GBIFID: 1993774026; Occurrence Remarks: My wife spotted this creature about a foot to my west under a scraggly plant as I was fiddling with a camera on a tripod. She had reached down to get me something and said, Theres a snake here! It never gave the customary notice of our objectionable proximity to it, however.;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 1143563270; Occurrence Remarks: Big, beautiful - at least 45 long - lots of green 74 F Rocky slope above ravine Kendall County, TX;; Coordinate Uncertainty in Meters: 29458.00000.

GBIFID: 2013707624; Occurrence Remarks: Dor;; Coordinate Uncertainty in Meters: 3.00000.

GBIFID: 4945693885; Occurrence Remarks: Longer than 4 feet;; Coordinate Uncertainty in Meters: 32.00000.

GBIFID: 4950585453; Occurrence Remarks: Found by park ranger staff;; Coordinate Uncertainty in Meters: 29483.00000.

GBIFID: 5133177316; Occurrence Remarks: Very skinny snake.;; Coordinate Uncertainty in Meters: 1843.00000.

GBIFID: 4936848780; Occurrence Remarks: Adult. With Doug Beckwith. Imaged only. GTS 3447.;; Coordinate Uncertainty in Meters: 10.00000.

GBIFID: 5217538328; Occurrence Remarks: I did not kill the snake;; Coordinate Uncertainty in Meters: 16.00000.

GBIFID: 2311412977; Occurrence Remarks: one of two seen on Haul Road (private road);; Coordinate Uncertainty in Meters: 25.00000.

GBIFID: 5231617271; Occurrence Remarks: AOR subadult. With Doug Beckwith.;; Coordinate Uncertainty in Meters: 3.00000.

GBIFID: 5238080725; Occurrence Remarks: Several feet off the ground in the branches. Left undisturbed.;; Coordinate Uncertainty in Meters: 29483.00000.

GBIFID: 2397570341; Occurrence Remarks: AOR; not collected;; Coordinate Uncertainty in Meters: 6.00000.

GBIFID: 2397641424; Occurrence Remarks: Cuevas Amarillas, Big Bend Ranch State Park, Presidio County Texas;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 3079687655; Occurrence Remarks: sorry to have them killed but they were on my neighbors porch. Looks like maybe a male and female. Larger one is almost 3 feet long.;; Coordinate Uncertainty in Meters: 29483.00000.

GBIFID: 1269581415; Occurrence Remarks: Black tail rattlesnake;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 2423210879; Occurrence Remarks: Tom Harrigan observation;; Coordinate Uncertainty in Meters: 29458.00000.

GBIFID: 1265896440; Occurrence Remarks: observed & photographed at 5:26 pm by Ky Harkey;; Coordinate Uncertainty in Meters: 29458.00000.

GBIFID: 1273844425; Occurrence Remarks: With Cullen Hanks and James Evans.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 1453216066; Occurrence Remarks: This photo was posted to facebook by Stacy Belluardo Berry. It was posted here with her permission as she isnt an Inaturalist user. I thought this record was interesting enough to be posted by a 3rd party.;; Coordinate Uncertainty in Meters: 29433.00000.

GBIFID: 891771995; Occurrence Remarks: Found dor in the vicinity of the intersection of FM 3159 and FM 2673 near Startzville. GPS coordinates approximate.;; Coordinate Uncertainty in Meters: 57.00000.

GBIFID: 1453463206; Occurrence Remarks: On private property with permission;; Coordinate Uncertainty in Meters: 29483.00000.

GBIFID: 1453538099; Occurrence Remarks: Aor;; Coordinate Uncertainty in Meters: 13.00000.

GBIFID: 899955552; Occurrence Remarks: Curled on road cut at about 11pm, right before a rain storm.;; Coordinate Uncertainty in Meters: 460.00000.

GBIFID: 2864575747; Occurrence Remarks: Saw 2 near one another Both were males;; Coordinate Uncertainty in Meters: 29458.00000.

GBIFID: 1562897028; Occurrence Remarks: Up on a rock hill;; Coordinate Uncertainty in Meters: 1.11000.

GBIFID: 2864690865; Occurrence Remarks: Observed & photographed by Tom H & Patrick N;; Coordinate Uncertainty in Meters: 29458.00000.

GBIFID: 4937090633; Occurrence Remarks: Young adult female observed while walking off roadside (Hwy 277). With Gary Heyroth. GTS 1752. This specimen was collected and became founder stock for several generations of offspring now being produced in my collection.;; Coordinate Uncertainty in Meters: 7.00000.

GBIFID: 4937074432; Occurrence Remarks: Adult found out walking this arroyo w Fujita Lab Group (w Dr. Corey Roelke) from UT Arlington on a private ranch. Two were observed in several hours of walking. Imaged only. GTS 2793.;; Coordinate Uncertainty in Meters: 3.00000.

GBIFID: 3301857854; Occurrence Remarks: Curled up way back in a hole;; Coordinate Uncertainty in Meters: 24.00000.

GBIFID: 1024212515; Occurrence Remarks: AOR First ornatus I have ever seen in Bexar county.;; Coordinate Uncertainty in Meters: 10.00000.

GBIFID: 4936268685; Occurrence Remarks: Under a rock (as flipped) off the shoulder of Hwy 118 on South Hill of the Christmas Mountains. Imaged only. GTS 729. UTA DC 7268.;; Coordinate Uncertainty in Meters: 11.00000.

GBIFID: 4935911210; Occurrence Remarks: Adult crossing roadway. Imaged only. GTS 3984.;; Coordinate Uncertainty in Meters: 3.00000.

GBIFID: 4936180384; Occurrence Remarks: In ambush posture, resting head on rock. This individual found a spot surrounded by rocks that it could ambush prey. I have not previously observed such a situation. With Trey Petty who pointed out this specimen to me. Imaged from the right side of the snake. Imaged only. GTS 3985.;; Coordinate Uncertainty in Meters: 29483.00000.

GBIFID: 3337415181; Occurrence Remarks: Observed with Romey Swanson.;; Coordinate Uncertainty in Meters: 7.00000.

GBIFID: 3337999583; Occurrence Remarks: Crotalus ornatus;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 4937072229; Occurrence Remarks: Young adult male. Imaged only. GTS 4014.;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 3384835075; Occurrence Remarks: Approx 2 ft long and about an inch at its widest point. I left him as I found him alive and well!;; Coordinate Uncertainty in Meters: 1887.00000.

GBIFID: 4936459388; Occurrence Remarks: Adult in roadway. With Mary and Isabella. Imaged only. GTS 3980.;; Coordinate Uncertainty in Meters: 3.00000.

Presidio, Texas: 29.844138, -104.124044: : 8/26/2025: george brode: 26 Aug 2025 ; Coordinate Uncertainty in Meters: 47983.00000.

GBIFID: 4936285128; Occurrence Remarks: With Doug Beckwith. Imaged only. GTS 4016.;; Coordinate Uncertainty in Meters: 4.00000.

Coyame del Sotol, Chihuahua: 29.550759, -105.441961: : 7/30/2019: FERNANDO QUIROZ: 30 Jul 2019 ; Coordinate Uncertainty in Meters: 0.11000.

Brewster, Texas: 29.527875, -103.124122: : 9/8/2025: Robert Dowler: 8 Sep 2025 ; Coordinate Uncertainty in Meters: 2.00000.

Brewster, Texas: 30.052664, -103.579095: : 9/2/2025: Nick Loveland: 2 Sep 2025 ; Coordinate Uncertainty in Meters: 4.00000.

Ojinaga, Chihuahua: 29.366697, -104.118576: : 12/4/2014: Jared Holmes: 4 Dec 2014 ; Coordinate Uncertainty in Meters: 7396.00000.

Occurrence Remarks: Occurrence Remarks: DOR; Coordinate Uncertainty in Meters: 29330.00000.

Occurrence Remarks: Occurrence Remarks: DOR Someone cut off rattler and sliced it open?; Coordinate Uncertainty in Meters: 3.00000.

Occurrence Remarks: Occurrence Remarks: Drinking water from the pavementΓÇª; Coordinate Uncertainty in Meters: 29252.00000.

Presidio, Texas: 30.27037, -103.807137: : 6/28/2024: dancparks: 28 Jun 2024 ; Coordinate Uncertainty in Meters: 4.00000.

Occurrence Remarks: Naturalista; Coordinate Uncertainty in Meters: 29252.00000.

Jeff Davis, Texas: 30.808835, -103.874748: : 9/2/2025: jugbayjs: 2 Sep 2025 ; Coordinate Uncertainty in Meters: 45.00000.

Occurrence Remarks: Naturalista Expuesta; Coordinate Uncertainty in Meters: 29252.00000.

GBIFID: 4937097577; Occurrence Remarks: DOR adult male on Hwy 118. Found overnight (prior to time on image). Imaged only. GTS 604.;; Coordinate Uncertainty in Meters: 50.00000.

Crockett, Texas: 30.314949, -101.533501: : 4/29/2026: Sean Daniels: 29 Apr 2026 ; Coordinate Uncertainty in Meters: 2.00000.

Occurrence Remarks: Fort Davis 8:15pm 4/14/2026; Coordinate Uncertainty in Meters: 28.00000.

Terrell, Texas: 30.448733, -101.834983: : 4/17/2026: David M. Hillis: 17 Apr 2026 ; Coordinate Uncertainty in Meters: 3.00000.

Hudspeth, Texas: 30.776592, -105.016311: : 5/2/2026: J. W. Nelson: 2 May 2026 ; Coordinate Uncertainty in Meters: 14.00000.

Jeff Davis, Texas: 30.635208, -103.854349: : 5/31/2026: Mothington: 31 May 2026 ; Coordinate Uncertainty in Meters: 23.00000.

Pecos, Texas: 30.689681, -101.97186: : 4/25/2026: Jorden Perrett: 25 Apr 2026 ; Coordinate Uncertainty in Meters: 29330.00000.

Jeff Davis, Texas: 30.604403, -103.899155: : 7/4/2026: immanus: 4 Jul 2026 ; Coordinate Uncertainty in Meters: 7.00000.

Crockett, Texas: 30.792811, -101.641799: : 4/25/2026: Jorden Perrett: 25 Apr 2026 ; Coordinate Uncertainty in Meters: 29330.00000.

Jeff Davis, Texas: 30.675272, -104.026681: : 5/11/2026: Zach Vanderbosch: 11 May 2026 ; Coordinate Uncertainty in Meters: 86.00000.

Occurrence Remarks: AOR juvenile. With Jeff Adams.; Coordinate Uncertainty in Meters: 4.00000.

Pecos, Texas: 30.462467, -102.930153: : 3/26/2026: Katherine Lentz: 26 Mar 2026 ; Coordinate Uncertainty in Meters: 7.00000.

Unknown, Chihuahua: 31.339493, -106.534256: : 4/7/2026: Rolando Rueda Torres: 7 Apr 2026 ; Coordinate Uncertainty in Meters: 0.11000.

Jeff Davis, Texas: 30.697648, -104.089841: : 8/24/2025: Joseph Aubert: 24 Aug 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Jeff Davis, Texas: 30.650695, -103.805855: : 9/26/2025: Ari Rice: 26 Sep 2025 ; Coordinate Uncertainty in Meters: 3.00000.

Pecos, Texas: 30.46252, -102.930068: : 3/26/2026: Mothington: 26 Mar 2026 ; Coordinate Uncertainty in Meters: 2.00000.

Jeff Davis, Texas: 30.6338, -103.933004: : 6/22/2026: jack4rogers: 22 Jun 2026 ; Coordinate Uncertainty in Meters: 29330.00000.

Occurrence Remarks: Subadult, seen in ambush at the entrance of a rock crevice.; Coordinate Uncertainty in Meters: 29382.00000.

Jeff Davis, Texas: 30.696613, -103.955804: : 6/20/2026: Jorden Perrett: 20 Jun 2026 ; Coordinate Uncertainty in Meters: 29330.00000.

GBIFID: 4936078553; Occurrence Remarks: Found under rocks in late afternoon. Opaque. Not retained (imaged only). GTS 1077. UTA DC 7461.;; Coordinate Uncertainty in Meters: 14.00000.

GBIFID: 3759425154; Occurrence Remarks: Intercepted on the starting point of the summit trail at Enchanted Rock.;; Coordinate Uncertainty in Meters: 3.00000.

GBIFID: 4936934745; Occurrence Remarks: AOR adult on FM 1832 nr Hwy 17. GTS 777. UTA DC 7303-04.;; Coordinate Uncertainty in Meters: 10.00000.

GBIFID: 4936093349; Occurrence Remarks: AOR on Hwy 90. With Craig Trumbower. Imaged only. GTS 759. UTA DC 7288-89. Map point is approximate.;; Coordinate Uncertainty in Meters: 100.00000.

GBIFID: 3455852436; Occurrence Remarks: Observation and ID generated from photo library and submitted with Earthdeck AI for iPhone. ![Earthdeck app **[Get Earthdeck for iPhone](https://bit.ly/earthdeck)**;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 3902530694; Occurrence Remarks: Approx. 2 in length. Photo and ID by PP.;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 3902469827; Occurrence Remarks: About 4 1/2 ft.;; Coordinate Uncertainty in Meters: 372.00000.

GBIFID: 3859691258; Occurrence Remarks: Seen at 10am originally sunning on a trail;; Coordinate Uncertainty in Meters: 15.00000.

GBIFID: 1880496665; Occurrence Remarks: Behind a retaining wall near a rock pile;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 3911988098; Occurrence Remarks: This one was stunning;; Coordinate Uncertainty in Meters: 29330.00000.

GBIFID: 3912009180; Occurrence Remarks: Huge and gorgeous ??;; Coordinate Uncertainty in Meters: 29407.00000.

GBIFID: 1883954179; Occurrence Remarks: Coiled beside retaining wall at road edge.;; Coordinate Uncertainty in Meters: 29330.00000.

GBIFID: 1883954643; Occurrence Remarks: Coiled in crevice on road cut.;; Coordinate Uncertainty in Meters: 29330.00000.

GBIFID: 1883954691; Occurrence Remarks: Coiled at base of road cut.;; Coordinate Uncertainty in Meters: 29330.00000.

GBIFID: 4116678386; Occurrence Remarks: Snake was abut a foot long. ? juvenile of some sort.;; Coordinate Uncertainty in Meters: 31.00000.

GBIFID: 1913171359; Occurrence Remarks: Juvenile C. ornatus climbing an oak tree.;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 4063026216; Occurrence Remarks: 2/20 Adult located at the top of a hill composed of mostly conglomerate rock. The high elevation area is situated near deep arroyos and an old human settlement. The individual appeared to be sunning itself and will more than likely look to go to a lower elevation in the coming weeks. Despite the variable temperatures, the individual is still active.;; Coordinate Uncertainty in Meters: 110.00000.

GBIFID: 1098918300; Occurrence Remarks: Small-medium sized snake. Hunting a road cut. Tagged and ate a mouse, Peromyscus spp;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 4126814155; Occurrence Remarks: Approx. 3Æ in length. Did not rattle despite our relative (safe) close proximity and awareness of us. Two photos (iPhone 10S) & entry by CP. Additional photos with the good camera (from the side, toungue extended, and, just a little later, coiled under the Juniperus sp.) by PP.;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 1253298217; Occurrence Remarks: DOR sub-adult ; elevation 4045.28 feet; moon waning crescent; sky condition unknown; pressure 29.65 inHg; humidity 54 percent. Salvaged under permit and deposited with Texas Natural History Collections at University of Texas--Austin.;; Coordinate Uncertainty in Meters: 11.10000.

GBIFID: 1253298224; Occurrence Remarks: Road cruised adult ; elevation 3864.83 feet; moon waning crescent; sky condition unknown; pressure 29.65 inHg; humidity 54 percent. Donated to Texas A&M--Kingsville Venom Lab for cancer research.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 4145658735; Occurrence Remarks: Road-killed. Approx. 2Æ in length. Photo & entry by CP.;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 4405012615; Occurrence Remarks: Male sitting on the rocks right at dusk.;; Coordinate Uncertainty in Meters: 23.00000.

GBIFID: 4400219685; Occurrence Remarks: Two individuals copulating just off the trail at the CDRI Nature Center garden. Photos (iPhone) & entry by PP. Short video available.;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 4936006240; Occurrence Remarks: Adult DOR on Hwy 90 ~ 18 miles E of Hwy 385. GTS 792. SRSU 6008 (Herpetology collection at Sul Ross State University, Alpine, Texas).;; Coordinate Uncertainty in Meters: 10.00000.

GBIFID: 4935914538; Occurrence Remarks: Young adult at the MO Ranch. Image supplied by Rick Tozer.;; Coordinate Uncertainty in Meters: 50.00000.

GBIFID: 1135213773; Occurrence Remarks: DOR adult, not fresh roadkill. Grassland shrubland in valley floor with rock bluffs and cliffs nearby. N30.87850 W-104.15356 JPK-2596;; Coordinate Uncertainty in Meters: 10.00000.

GBIFID: 4936559830; Occurrence Remarks: On the Alpine Big Hill on Hwy 118 (6 miles south of Alpine); walked by Doug Beckwith (~ 20 TL). Imaged only (by him).;; Coordinate Uncertainty in Meters: 20.00000.

GBIFID: 4937265143; Occurrence Remarks: Juvenile walked by Doug Beckwith on the south cut of the Alpine Big Hill. Imaged only (by him).;; Coordinate Uncertainty in Meters: 20.00000.

GBIFID: 4416745588; Occurrence Remarks: Found in base of BBQ grill at private residence in town. Length app. 24 inches. At owners request, relocated to nearby public property. Photo (iPhone 10S) & entry by PP.;; Coordinate Uncertainty in Meters: 29356.00000.

GBIFID: 1135353281; Occurrence Remarks: Found fresh DOR;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 4453796977; Occurrence Remarks: Rattlesnake with diamond shaped pattern on back and black stripes going across body. Found by Squaw Spring at IMRS hidden under a rock.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 4453893995; Occurrence Remarks: Rattlesnake found between two large rocks near a mountain spring near the Indio mountain research station. Black rings and diamond patterns up and down the whole body increasing in darkness closer to the head;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 4936236442; Occurrence Remarks: Large juvenile AOR on the Scout Road. With Bernd Skubowius. Imaged only. GTS 2964.;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 1143539907; Occurrence Remarks: Black tailed Rattle Snake;; Coordinate Uncertainty in Meters: 59.00000.

GBIFID: 4852239575; Occurrence Remarks: heading east on road at dusk around 8;; Coordinate Uncertainty in Meters: 12.00000.

GBIFID: 4852077020; Occurrence Remarks: Thought it was just another atrox at first but upon closer examination, it was a lifer!;; Coordinate Uncertainty in Meters: 14.00000.

GBIFID: 4874998152; Occurrence Remarks: Observed this young eastern black-tail rattlesnake in the road while at work. Moved it off so it didnt get killed. Lifer find!;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 2236898775; Occurrence Remarks: Found on leaf litter. Had light green, dark green and black colors.;; Coordinate Uncertainty in Meters: 4208.00000.

GBIFID: 4904344478; Occurrence Remarks: Just the shed skin;; Coordinate Uncertainty in Meters: 29356.00000.

GBIFID: 4901952157; Occurrence Remarks: AOR - seen crossing the road after almost getting back to the car after shining a cut;; Coordinate Uncertainty in Meters: 29382.00000.

GBIFID: 4937194884; Occurrence Remarks: With ECT Sr. Specimen had a recent meal.;; Coordinate Uncertainty in Meters: 29407.00000.

GBIFID: 4946712498; Occurrence Remarks: Found sunning on the road around 7:30 am. About 3 feet long with well developed rattles and a distinct black tail;; Coordinate Uncertainty in Meters: 158.00000.

GBIFID: 4949875923; Occurrence Remarks: DOR not identified but body size probably a rattlesnake With Mike Geiger;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 4952361459; Occurrence Remarks: Observed in boulder field in Little Hatchet Mountains. The snake was aware of our presence and poked its head up to investigate us a few times before slowly working its way back into the rocks. The snake rattled only once briefly when I moved quickly and suddenly. Unsure of ID between C. molossus and C. ornatus but will attempt to ID later. Im unsure of what each species range looks like in the NM bootheel. This was our last stop before heading back home and it was nice to find a snake almost immediately after getting skunked all day in the Big Hatchets.;; Coordinate Uncertainty in Meters: 29199.00000.

GBIFID: 4950412627; Occurrence Remarks: With Mike Geiger;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 4935813487; Occurrence Remarks: Adult. With Doug Beckwith. Imaged only. GTS 3444.;; Coordinate Uncertainty in Meters: 10.00000.

GBIFID: 2269239094; Occurrence Remarks: 64 degrees air temperature.;; Coordinate Uncertainty in Meters: 1632.00000.

GBIFID: 2269246027; Occurrence Remarks: Measured 52ö caught on top of road cut. Worked and released.;; Coordinate Uncertainty in Meters: 29278.00000.

GBIFID: 1265542938; Occurrence Remarks: found by JC Aceves;; Coordinate Uncertainty in Meters: 29407.00000.

GBIFID: 5168016296; Occurrence Remarks: Absolutely gorgeous snake. Included head and tail for ID. Skyline drive;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 891164008; Occurrence Remarks: Live on the road, 82 degrees;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 891164018; Occurrence Remarks: Curled up on dirt road, 82 degrees;; Coordinate Uncertainty in Meters: 111.00000.

GBIFID: 1269540403; Occurrence Remarks: Kept for venom lab;; Coordinate Uncertainty in Meters: 9407.00000.

GBIFID: 5231594977; Occurrence Remarks: This ornatus was perched on this rock in this cool head down hunting position.;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 5238049063; Occurrence Remarks: Became defensive from surprisingly far away. I was still 4-5 body lengths out of striking distance when it began rattling. Some time later after it had calmed under cover it rattled again briefly with no apparent stimulation;; Coordinate Uncertainty in Meters: 29330.00000.

GBIFID: 2429225147; Occurrence Remarks: Not depicted in the photograph, but had a distinctive black tail, keeled scales and dorsal pattern of Crotalus ornatus...;; Coordinate Uncertainty in Meters: 29173.00000.

GBIFID: 5238191796; Occurrence Remarks: Subadult female on highway shoulder.;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 5238312844; Occurrence Remarks: This individual was found dead on road with a large prey bolus. I collected it and took data. Most of rattle missing upon my observation. I have found many rattlesnakes that have had the rattle cut, pulled or spun off when found dead on the road. Of course, rattlesnakes can lose their rattles but I rarely (if ever) find a live one crossing a road without one. This specimen was crushed but also has a chopping mark in its neck area. I think the human encounter was more than being run over. Adult female. Total length: 37.5 (95 cm); Snout-vent length: 34.25 (86.5 cm). Dissected and found it had eaten a rat, head first, and most of the foreparts of the rat were digested, or mostly digested. Total weight of snake with meal: 683.3 grams. Snake after removal of remaining parts of the rat (estimated at ~ 80%): 499.1 grams. Meal remainder: 184.2 grams. This snakes meal was 37% of its mass when found. If 80% is correct, the mass of the rat would have been 230.25 grams at time of ingestion thus making it 46% of the mass of the predator. This large meal would have made it difficult to crawl normally and may have contributed to this snakes demise. Question: Why did it choose to move? It would seem to me that this snake could not effectively crawl until this point in the digestion of the rat, and even at this point not so well. The first image was posed to include detail and is not as found (was stretched out).;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 4936391481; Occurrence Remarks: Adult crossing roadway at the Calamity Creek bridge. With Doug Beckwith. Imaged only. GTS 3533.;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 4936331003; Occurrence Remarks: Large adult male DOR on FM 2400. With Jeff Adams. Not retained. Imaged only. GTS 3540.;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 4937078717; Occurrence Remarks: AOR adult on Hwy 90. With Dustin Rhoads (recorded also by him - http://www.inaturalist.org/observations/2787963). Imaged only. GTS 1287. First SnakeDays in Sanderson weekend.;; Coordinate Uncertainty in Meters: 50.00000.

GBIFID: 2350401859; Occurrence Remarks: Nearly ran over this gorgeous specimen on the highway (straddled him going 70 mph). Went back and assisted it off the road. Photos and entry by PP.;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 891711102; Occurrence Remarks: 10:30pm DOR. Fresh kill. Looks like someone peeled out on top of it. Male, 78F. Road temp 84F.;; Coordinate Uncertainty in Meters: 91.00000.

GBIFID: 891712017; Occurrence Remarks: Appeared to be a gravid female basking on road.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 2397565975; Occurrence Remarks: Davis Mountains Nature Conservancy Preserve, Jeff Davis County Texas;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 1272113800; Occurrence Remarks: Blacktail rattlesnake;; Coordinate Uncertainty in Meters: 28.00000.

GBIFID: 891718973; Occurrence Remarks: 76 degrees, very recent rains;; Coordinate Uncertainty in Meters: 111.00000.

GBIFID: 2465264481; Occurrence Remarks: This rattlesnake with an accentuated black tail was found late at night. We were alerted to its presence by the warning rattle it gave off.;; Coordinate Uncertainty in Meters: 9079.00000.

GBIFID: 891720396; Occurrence Remarks: Quantity= 1, County was Brewster County, Coordinates Derived from GPS using WGS84 datum, Observation was DOR, Specimen age Adult, , Sex Female, Elevation (ft): 4533, Moon Phase: New Moon, Sky Condition unknown, Air Temp (F): unknown, Surface Temp (F): unknown, Pressure (in Hg): unknown, Relative Humidity (percent): unknown, Habitat Desert Highway, Search Time (minutes): 425, Just under 3 long. Salvaged under permit from TPWD., other observers: Michael Price, Justin Garza.;; Coordinate Uncertainty in Meters: 10.00000.

GBIFID: 1291094019; Occurrence Remarks: DOR, salvaged for TNHC 70F;; Coordinate Uncertainty in Meters: 29356.00000.

GBIFID: 1291111258; Occurrence Remarks: AOR, woohoo! Beautiful snake!;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 891730992; Occurrence Remarks: DOR Black-tailed Rattlesnake Hwy 67 south of Marfa, Texas Someone had cut off the rattles of this DOR Black-tail. Nice specimen, about 4 feet in length;; Coordinate Uncertainty in Meters: 11.10000.

GBIFID: 891735610; Occurrence Remarks: Dor 78 degrees;; Coordinate Uncertainty in Meters: 11.10000.

GBIFID: 1291108730; Occurrence Remarks: Sitting in Marfa Lights Viewing parking lot, relocated down the road;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 891736837; Occurrence Remarks: 74 degrees;; Coordinate Uncertainty in Meters: 111.00000.

GBIFID: 4937049590; Occurrence Remarks: Yearling-sized juvenile observed on roadside rock cut while walking shortly after dark. Scan from a slide. June 1995 (date above is approximate). Imaged only.;; Coordinate Uncertainty in Meters: 25.00000.

GBIFID: 891736836; Occurrence Remarks: For, 78 degrees;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 1305135670; Occurrence Remarks: Dead on road.;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 1315053593; Occurrence Remarks: Cell phone photo taken by Rob Cole, apologies it is not more clear.;; Coordinate Uncertainty in Meters: 2.00000.

GBIFID: 1305151933; Occurrence Remarks: Adult AOR after dark in oak-pinyon-juniper with savanna N30.7045642 W-104.099706 JPK-2867;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 1640032256; Occurrence Remarks: Photo by J. Garza;; Coordinate Uncertainty in Meters: 29226.00000.

GBIFID: 1323029861; Occurrence Remarks: Photo by JGarza;; Coordinate Uncertainty in Meters: 29199.00000.

GBIFID: 2634119964; Occurrence Remarks: With Mike Pucket;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 2814121878; Occurrence Remarks: Moving at base of cut.;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 1453463461; Occurrence Remarks: Private Ranch;; Coordinate Uncertainty in Meters: 2.00000.

GBIFID: 1453463500; Occurrence Remarks: Private Ranch;; Coordinate Uncertainty in Meters: 2.00000.

GBIFID: 1453463457; Occurrence Remarks: Private Ranch;; Coordinate Uncertainty in Meters: 2.00000.

GBIFID: 2814131393; Occurrence Remarks: In ambush.;; Coordinate Uncertainty in Meters: 29407.00000.

GBIFID: 2873937731; Occurrence Remarks: crossing access road in Colorado Bend State Park;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 4936416333; Occurrence Remarks: Adult on shoulder of roadway. Imaged only. GTS 3816.;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 4935827953; Occurrence Remarks: Large adult male observed with Bill Lamoreaux. Imaged only. GTS 2807.;; Coordinate Uncertainty in Meters: 3.00000.

GBIFID: 4935987918; Occurrence Remarks: Adult on roadway. Imaged only. GTS 2811.;; Coordinate Uncertainty in Meters: 3.00000.

GBIFID: 923916819; Occurrence Remarks: On road;; Coordinate Uncertainty in Meters: 500.00000.

GBIFID: 1621782860; Occurrence Remarks: Small adult in rock pile/boulders JPK-3305;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 923925010; Occurrence Remarks: Live on road 78 degrees;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 1024184747; Occurrence Remarks: Method: Visual encounter; Juvenile; Elevation (ft): 2712; Moon: Waning Crescent; Sky: Clear; Cool (70s) and windy.; Other Observers: Michael Price, Shaye Price, Nolan Price;; Coordinate Uncertainty in Meters: 11.10000.

GBIFID: 1024184869; Occurrence Remarks: Method: DOR; Elevation (ft): 1928; Moon: Waning Crescent; Salvaged under TPWD permit and deposited with UT-Austin Texas Natural History Collections.;; Coordinate Uncertainty in Meters: 11.10000.

GBIFID: 911502544; Occurrence Remarks: Captured near Independence Creek Preserve, TX. May be duplicate photos on iNaturalist.;; Coordinate Uncertainty in Meters: 29356.00000.

GBIFID: 4936408325; Occurrence Remarks: AOR on Hwy 90. With Gary Heyroth. Not collected. GTS 1770.;; Coordinate Uncertainty in Meters: 10.00000.

GBIFID: 3118228757; Occurrence Remarks: Long, around 3ft in length. Docile, simply crossed the road and never once rattled. Solid black rattle.;; Coordinate Uncertainty in Meters: 20.00000.

GBIFID: 1024197569; Occurrence Remarks: ~85* Fahrenheit;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 4935827896; Occurrence Remarks: DOR on Hwy 90. GTS 1727. TNHC 94862.;; Coordinate Uncertainty in Meters: 3.00000.

GBIFID: 1668857001; Occurrence Remarks: Fresh DOR;; Coordinate Uncertainty in Meters: 2064.00000.

GBIFID: 4936445166; Occurrence Remarks: Large adult male DOR on Hwy 290. GTS 1584. TNHC 94847.;; Coordinate Uncertainty in Meters: 10.00000.

GBIFID: 1024223083; Occurrence Remarks: Live on mt top north of Sanderson;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 1024203529; Occurrence Remarks: Adult female out active near boulders with some grasses and pines on steep slope of Mount Livermore in The Nature Conservancys Davis Mountains Preserve. N30.63774 W-104.16571;; Coordinate Uncertainty in Meters: 25.00000.

GBIFID: 1668872200; Occurrence Remarks: Eastern black-tailed rattlesnake (Viperidae, Crotalinae, Crotalus ornatus (Hallowell)) USA, TX, Jeff Davis County 22.ix.2017;; Coordinate Uncertainty in Meters: 4361.00000.

GBIFID: 1024209263; Occurrence Remarks: Adult active along roadside, grassland savanna habitat with numerous catclaw acacia, cholla and some shrubs. Animal found by Joe Furman and numerous photos taken. N30.66685 W-104.03664;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 4936607654; Occurrence Remarks: AOR adult on Hwy 17. Imaged only. GTS 731. UTA DC 7270.;; Coordinate Uncertainty in Meters: 3.00000.

GBIFID: 1024225566; Occurrence Remarks: Adult black-tailed rattlesnake hit but alive in SH118. Road in canyon between riparian Limpia Creek valley floor and shrubby boulder/cliff faces in Limpia Canyon. N30.60439 W-103.89590;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 3338004795; Occurrence Remarks: Large DOR;; Coordinate Uncertainty in Meters: 1991.00000.

GBIFID: 1024225564; Occurrence Remarks: Adult roadkill (DOR) in Madera Canyon valley floor, oak-pinyon-juniper open woodland N30.70753 W-104.09880 Specimen to USNM;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 3355278281; Occurrence Remarks: Hit probably about one minute before we found it, individual was still moving;; Coordinate Uncertainty in Meters: 82451.00000.

Jeff Davis, Texas: 30.697677, -104.089848: : 8/23/2025: Brent Franklin: 23 Aug 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Culberson, Texas: 31.806073, -104.904692: : 8/23/2025: David Heckard: 23 Aug 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: Foto por Ismael Ontiveros en CCV-UACJ (coleccion digital).; Coordinate Uncertainty in Meters: 1300.00000.

Ascension, Chihuahua: 31.052934, -107.731934: : 10/24/2018: Alejandro Colmenero: 24 Oct 2018 ; Coordinate Uncertainty in Meters: 102730.00000.

Occurrence Remarks: Species name: Eastern Black-tailed Rattlesnake Scientific name: Crotalus ornatus; Coordinate Uncertainty in Meters: 29199.00000.

Occurrence Remarks: Approx. 2-3ΓÇÖ length. Road-killed - position in ΓÇ£tire trackΓÇ¥ portion of lane suggests possibly inadvertent. iPhone photo & entry by CP.; Coordinate Uncertainty in Meters: 6.00000.

Ascension, Chihuahua: 31.048228, -107.748413: : 10/25/2018: Alejandro Colmenero: 25 Oct 2018 ; Coordinate Uncertainty in Meters: 185213.00000.

Ahumada, Chihuahua: 30.994108, -106.565617: : 1/1/2005: javicordova78: 1 Jan 2005 ; Coordinate Uncertainty in Meters: 1731.00000.

Ahumada, Chihuahua: 30.094404, -106.309862: : 7/5/2019: Gerardo Ramos-Le├│n: 5 Jul 2019 ; Coordinate Uncertainty in Meters: 29407.00000.

Occurrence Remarks: Approx. 3 length. Road-killed. iPhone photos & entry by CP.; Coordinate Uncertainty in Meters: 4.00000.

Juarez, Chihuahua: 31.290614, -106.499569: : 4/22/2018: C├⌐sar Osvaldo Ponce Rivas: 22 Apr 2018 ; Coordinate Uncertainty in Meters: 29252.00000.

Juarez, Chihuahua: 31.210178, -106.571895: : 10/11/2017: David Alejandro Garcia Palacios: 11 Oct 2017 :
Occurrence Remarks: Naturalista; Coordinate Uncertainty in Meters: 29252.00000.

Ahumada, Chihuahua: 31.009188, -106.187532: : 7/28/2016: raulsolish: 28 Jul 2016 ; Coordinate Uncertainty in Meters: 0.11000.

Hidalgo, New Mexico: 31.780534, -108.443904: : 9/1/2025: Brian Long: 1 Sep 2025 ; Coordinate Uncertainty in Meters: 15.00000.

Culberson, Texas: 31.805042, -104.90335: : 7/19/2026: Richard Brown: 19 Jul 2026 ; Coordinate Uncertainty in Meters: 4.00000.

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

Occurrence Remarks: Occurrence Remarks: Rattlesnake observed coiled in a Mexican buckeye (Ungnadia speciosa) in a canyon in the Organ Mountains.; Coordinate Uncertainty in Meters: 29120.00000.

Occurrence Remarks: Occurrence Remarks: Roadkill rattlesnake on side of road. Partially eaten by a turkey vulture; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: Occurrence Remarks: Snake seen along a trail in the Organ Mountains. We walked past the snake and didnt notice it until it started rattling. We took a few photos and left it alone.; Coordinate Uncertainty in Meters: 29120.00000.

Occurrence Remarks: Occurrence Remarks: DOR; Coordinate Uncertainty in Meters: 29039.00000.

Occurrence Remarks: heard and saw the rattle; Coordinate Uncertainty in Meters: 196.00000.

Occurrence Remarks: Elevation approx. 6500; Coordinate Uncertainty in Meters: 29039.00000.

Occurrence Remarks: DOR, moved off road after photographing.; Coordinate Uncertainty in Meters: 29039.00000.

Bernalillo, New Mexico: 35.096939, -106.462867: : 10/15/2025: rangerdakota666: 15 Oct 2025 ; Coordinate Uncertainty in Meters: 9.00000.

Occurrence Remarks: This snake was pretty long about 30-40in or longer if soΓÇªHavenΓÇÖt seen a large one.; Coordinate Uncertainty in Meters: 2.00000.

Dona Ana, New Mexico: 32.382038, -106.54857: : 7/20/2026: Ari Rice: 20 Jul 2026 ; Coordinate Uncertainty in Meters: 160.00000.

Eddy, New Mexico: 32.265658, -104.665712: : 7/26/2026: Jacob Weinreich: 26 Jul 2026 ; Coordinate Uncertainty in Meters: 27.00000.

Occurrence Remarks: A sadistically mutilated Eastern Black-tailed Rattlesnake (Crotalus ornatus), Do├▒a Ana County, New Mexico Very upsetting to come across a snake writhing in the middle of the road sans head and tail. I hope the tchotchkes made from them were worth the bad karma. The snake was hit by car, but that doesnt explain the readiness of Headso to denogginate. Seems more likely the road hit was a means to an end.; Coordinate Uncertainty in Meters: 15.00000.

Occurrence Remarks: DOR; Coordinate Uncertainty in Meters: 29039.00000.

Luna, New Mexico: 32.144958, -107.622533: : 10/14/2025: williampaulwhite17: 14 Oct 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Dona Ana, New Mexico: 32.515901, -106.515472: : 11/5/2025: Jack Knight: 5 Nov 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Otero, New Mexico: 32.889795, -105.499987: : 5/15/2026: jcscoggins: 15 May 2026 ; Coordinate Uncertainty in Meters: 14338.00000.

Torrance, New Mexico: 34.567667, -106.439936: : 4/22/2026: Michael Shoop: 22 Apr 2026 ; Coordinate Uncertainty in Meters: 122.00000.

Dona Ana, New Mexico: 31.927867, -107.068378: : 4/7/2026: nichole.palacio: 7 Apr 2026 ; Coordinate Uncertainty in Meters: 0.11000.

Bernalillo, New Mexico: 35.087861, -106.399545: : 11/1/2025: sumira83: 1 Nov 2025 ; Coordinate Uncertainty in Meters: 19.00000.

Occurrence Remarks: Road fatality; Coordinate Uncertainty in Meters: 2.00000.

Dona Ana, New Mexico: 32.343662, -106.596568: : 5/22/2026: jmarchetti: 22 May 2026 ; Coordinate Uncertainty in Meters: 130.00000.

Occurrence Remarks: Tiny and sleeping; Coordinate Uncertainty in Meters: 25.00000.

GBIFID: 4080522494; Occurrence Remarks: Not shown in photos is the solid black tail (approximately 10 centimeters long) immediately proximal to the rattle;; Coordinate Uncertainty in Meters: 1.11000.

GBIFID: 3903480141; Occurrence Remarks: Dead on road;; Coordinate Uncertainty in Meters: 29173.00000.

Lincoln, New Mexico: 33.684766, -105.920008: : 5/9/2025: slvrsprngwanderer: 9 May 2025 ; Coordinate Uncertainty in Meters: 204.00000.

Luna, New Mexico: 32.059997, -107.611105: : 3/4/2026: Leah Chavez: 4 Mar 2026 ; Coordinate Uncertainty in Meters: 3.00000.

Occurrence Remarks: Black-tail spotted in a rock crack in the early afternoon of 8 March on the east side of the Organ Mountains, approximately 5,700 feet elevation. Also, my first snake of the year!; Coordinate Uncertainty in Meters: 29120.00000.

El Paso, Texas: 31.913353, -106.493089: : 4/22/2026: Ben Hutchins: 22 Apr 2026 ; Coordinate Uncertainty in Meters: 0.11000.

Otero, New Mexico: 32.894784, -105.917752: : 4/8/2026: brite-ny: 8 Apr 2026 ; Coordinate Uncertainty in Meters: 71.00000.

Culberson, Texas: 31.896069, -104.827404: : 5/7/2026: colin_yucca: 7 May 2026 ; Coordinate Uncertainty in Meters: 12.00000.

Sierra, New Mexico: 32.887664, -107.662761: : 4/20/2026: Micah Funk: 20 Apr 2026 ; Coordinate Uncertainty in Meters: 0.11000.

Sierra, New Mexico: 33.159355, -107.727325: : 7/8/2026: Henry Hutchinson: 8 Jul 2026 ; Coordinate Uncertainty in Meters: 6.00000.

Grant, New Mexico: 32.814731, -107.896103: : 8/9/2025: David Tan: 9 Aug 2025 ; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: This snake was found at night in the middle of some mountains. He got defensive upon being approached and curled into his defensive state.; Coordinate Uncertainty in Meters: 196.00000.

GBIFID: 3456070994; Occurrence Remarks: Observation and ID generated from photo library and submitted with Earthdeck AI for iPhone. ![Earthdeck app **[Get Earthdeck for iPhone](https://bit.ly/earthdeck)**;; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: unfortunately hit on road (not by us) and we saw it die

Grant, New Mexico: 32.949203, -107.935411: : 6/19/2026: Joshua Emms: 19 Jun 2026 ; Coordinate Uncertainty in Meters: 29039.00000.

GBIFID: 891092944; Occurrence Remarks: Just outside the locked main gate.;; Coordinate Uncertainty in Meters: 0.11000.

Culberson, Texas: 31.914875, -104.800349: : 9/27/2025: Benjamin Schwartz: 27 Sep 2025 ; Coordinate Uncertainty in Meters: 15.00000.

GBIFID: 3773071179; Occurrence Remarks: Crotalus ornatus, Sierra Larga on the northwest side of Cerro Venado, east of Socorro, 34.061 -106.559, Socorro County, New Mexico, 3 Oct 2021.;; Coordinate Uncertainty in Meters: 100.00000.

GBIFID: 3773409597; Occurrence Remarks: Nice surprise, slithering slowy throught the underbrush.;; Coordinate Uncertainty in Meters: 28734.00000.

GBIFID: 1841331527; Occurrence Remarks: Out basking, took unusually aggressive stance at the approach of vehicle;; Coordinate Uncertainty in Meters: 132084.00000.

GBIFID: 3873550006; Occurrence Remarks: Crossing an arroyo in the juniper savanna of the sepultura region of the Sevilleta National Wildlife Refuge.;; Coordinate Uncertainty in Meters: 27.00000.

GBIFID: 4080607491; Occurrence Remarks: Found basking in the middle of the trail at Pe├▒a Blanca on a warm-ish day in early December.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 3903174194; Occurrence Remarks: I was standing along the trail studying a plant when I got a warning rattle from this critter just a few feet away. However, there was a problem with its warning: It sounded just like the hundreds of cicadas Id been hearing at home in Austin over the past few months. Not so much a rattle but a high-pitched buzz, winding up to pitch just like the cicadas do. But something in my brain said: There arent likely to be any big cicadas right at this spot right now...so what is that?;; Coordinate Uncertainty in Meters: 150.00000.

GBIFID: 1891306326; Occurrence Remarks: One of the black-tails.;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 3903367254; Occurrence Remarks: Dead on road;; Coordinate Uncertainty in Meters: 29120.00000.

GBIFID: 4127088784; Occurrence Remarks: Snake was in a cluster of 20-foot syenite boulders, elev 1537 m (5043 ft). It did not coil and except for a very brief bzzzzt it did not rattle.;; Coordinate Uncertainty in Meters: 11.10000.

GBIFID: 4080450481; Occurrence Remarks: Found on the one way road leaving Aguirre Springs campground. Had been recently run over and still had reflexive movement.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 4405098229; Occurrence Remarks: Found on the move, just off the bitumen rd on a stormy afternoon at dusk. A sweet, gentle soul he was ??. Very healthy condition.;; Coordinate Uncertainty in Meters: 25.00000.

GBIFID: 1932353400; Occurrence Remarks: Observed at Luna Park campground.;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 1135524499; Occurrence Remarks: DOR.;; Coordinate Uncertainty in Meters: 694.00000.

GBIFID: 4424319480; Occurrence Remarks: Road kill;; Coordinate Uncertainty in Meters: 4.00000.

GBIFID: 1986564890; Occurrence Remarks: Scanned from slide... Month and year accurate, date approximate.;; Coordinate Uncertainty in Meters: 2.00000.

GBIFID: 4516760934; Occurrence Remarks: Eastern?;; Coordinate Uncertainty in Meters: 56.00000.

GBIFID: 4528407337; Occurrence Remarks: Copulating pair.;; Coordinate Uncertainty in Meters: 28902.00000.

GBIFID: 2005376435; Occurrence Remarks: Eastern Black-tailed Rattlesnake Crotalus ornatus at Ladder Ranch;; Coordinate Uncertainty in Meters: 4179.00000.

GBIFID: 4855268341; Occurrence Remarks: Seen on Baylor Pass Trail on the East side of the Organs;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 4909069359; Occurrence Remarks: Capitan Mountains;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 4908351332; Occurrence Remarks: This snake was on the trail in Guadalupe Mountains National Park in summer of 1973. We were hiking out from Bush Mountain and were about to descend the steep trail to the Pine Springs campground when this snake began rattling when we were a good 75 feet distant. He was on the trail, but quickly hid in the grass buzzing all the while. I took photos of him and these are poor representations of the snake as I copied these off my ancient contact sheet instead of scanning from my color film negative, which I still have and will scan and replace when I complete the chore. Meanwhile, we allowed the snake to move away and spare us the misery of a bite. He never struck at us, was a medium sized snake, neither large nor small.;; Coordinate Uncertainty in Meters: 31.00000.

GBIFID: 4925812499; Occurrence Remarks: I rounded a corner too fast coming down a trail and scared this snake. The snake struck at me (and missed) and started rattling as it retreated under a juniper.;; Coordinate Uncertainty in Meters: 29120.00000.

GBIFID: 4926332197; Occurrence Remarks: Very calm snake. Rattled briefly to let me know I was about to step on it and then slowly retreated into a crevice behind an Opuntia and watched me until I walked away.;; Coordinate Uncertainty in Meters: 29093.00000.

GBIFID: 4945765089; Occurrence Remarks: Juvenile rattlesnake found in small rock crack in Valles Canyon. Tail seen but not photographed; black with one small rattle button.;; Coordinate Uncertainty in Meters: 29093.00000.

GBIFID: 4946567628; Occurrence Remarks: Observed under a rock outcrop several miles north of Lake Valley townsite;; Coordinate Uncertainty in Meters: 29066.00000.

GBIFID: 4950300867; Occurrence Remarks: DOR.;; Coordinate Uncertainty in Meters: 33.00000.

GBIFID: 5108288051; Occurrence Remarks: lifer!;; Coordinate Uncertainty in Meters: 28874.00000.

GBIFID: 2269330325; Occurrence Remarks: Black-tailed Rattlesnake, near Manzano Mtns, Bernalillo Co.;; Coordinate Uncertainty in Meters: 3476.00000.

GBIFID: 2283064232; Occurrence Remarks: 2010 Southeast Arizona Herping Trip;; Coordinate Uncertainty in Meters: 29039.00000.

GBIFID: 5187936640; Occurrence Remarks: black-tailed;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 1265564743; Occurrence Remarks: Group of three within a few feet of each other. Under rubble from a ruined dam.;; Coordinate Uncertainty in Meters: 0.11000.

Bernalillo, New Mexico: 35.125841, -106.378276: : 8/9/2019: Sandia Mountain Natural History Center: 9 Aug 2019 :
GBIFID: 2350417650; Occurrence Remarks: We only know of 2 other rattlesnake sightings here at the SMNHC. This one was found right next to our office building.;; Coordinate Uncertainty in Meters: 192.00000.

GBIFID: 2423205629; Occurrence Remarks: Posting for a wildlife manager No copyright ┬⌐ on this photo;; Coordinate Uncertainty in Meters: 24.00000.

GBIFID: 2429355714; Occurrence Remarks: Back when I didnt have a camera with a zoom. My then 8 year old daughter noticed it and said Oh, a rattlesnake, in a very calm voice, impressing the adults in the group.;; Coordinate Uncertainty in Meters: 409.00000.

GBIFID: 2451750544; Occurrence Remarks: Date approximate within 3 days;; Coordinate Uncertainty in Meters: 29066.00000.

GBIFID: 2429333756; Occurrence Remarks: In old dwelling, discovered by hounds. . . moved more quickly than any rattlesnake Ive yet seen;; Coordinate Uncertainty in Meters: 526.00000.

GBIFID: 1640031672; Occurrence Remarks: Saw this blacktailed rattlesnake at Carlito Springs, in Tijeras, New Mexico (east of Albuquerque);; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 1802611336; Occurrence Remarks: Saw this blacktailed rattlesnake at Carlito Springs, in Tijeras, New Mexico (east of Albuquerque);; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 2596254497; Occurrence Remarks: Seen moving between rocks at Hueco Tanks State Park;; Coordinate Uncertainty in Meters: 69.00000.

GBIFID: 2620025708; Occurrence Remarks: Found this guy on top of Squaw Mountain at sunset!;; Coordinate Uncertainty in Meters: 93.00000.

GBIFID: 2626440710; Occurrence Remarks: Otero Canyon;; Coordinate Uncertainty in Meters: 6.00000.

GBIFID: 1323002659; Occurrence Remarks: Rattle snake crossing the road on Alto NM.;; Coordinate Uncertainty in Meters: 2752.00000.

GBIFID: 2851224278; Occurrence Remarks: Mantis riding on back;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 2851282461; Occurrence Remarks: Road fatality;; Coordinate Uncertainty in Meters: 5.00000.

GBIFID: 3113666336; Occurrence Remarks: Assume that this is likely an Eastern based on range in iNaturalist. I chose Northern Black-tailed Rattlesnake as this moniker seems to encompass both Eastern and Western Black-tailed Rattlesnake.;; Coordinate Uncertainty in Meters: 31.00000.

GBIFID: 1668898417; Occurrence Remarks: I stepped within a meter of it, but it didnt rattle at me. I saw its head move and a long black tongue move in and out.;; Coordinate Uncertainty in Meters: 0.11000.

GBIFID: 1802743037; Occurrence Remarks: Crotalus molossus, female, along North Percha Creek, east side of the Black Range, Sierra County, New Mexico, 24 Sep 2011.;; Coordinate Uncertainty in Meters: 500.00000.

Lincoln, New Mexico: 33.505, -105.492: : 5/7/2017: Cecelia Alexander: 7 May 2017 :
GBIFID: 1802728811; Occurrence Remarks: Crotalus molossus in Cave Canyon, east-northeast of Ft. Stanton and south of U.S. Hwy. 70, 33.505 -105.492, Lincoln County, 7 May 2017.;; Coordinate Uncertainty in Meters: 200.00000.

Dona Ana, New Mexico: 32.53772, -107.075851: : 8/19/2025: Brian Long: 19 Aug 2025 ; Coordinate Uncertainty in Meters: 29093.00000.

GBIFID: 3355180103; Occurrence Remarks: One of two spotted within 30 feet of each other.;; Coordinate Uncertainty in Meters: 0.11000.

Occurrence Remarks: Large blacktail rattlesnake found under a rock. Unsure of species between C. ornatus and C. molossus. Found in the Pinos Altos Range in NM if that helps.; Coordinate Uncertainty in Meters: 29039.00000.

Occurrence Remarks: I am so sick of inat. Adult blacktail found crossing trail, a day after rain, 75-85┬░; Coordinate Uncertainty in Meters: 28706.00000.

Occurrence Remarks: At ranch house at frijole ranch trail; Coordinate Uncertainty in Meters: 3.00000.

Dona Ana, New Mexico: 32.570958, -107.002098: : 8/19/2025: Brian Long: 19 Aug 2025 ; Coordinate Uncertainty in Meters: 29093.00000.

Occurrence Remarks: I was sent this photo. Not involved in the snakes death.; Coordinate Uncertainty in Meters: 29173.00000.

Bernalillo, New Mexico: 35.09912, -106.470301: : 7/19/2026: diabloceratops: 19 Jul 2026 ; Coordinate Uncertainty in Meters: 196.00000.

Occurrence Remarks: Found when it rattled at me from about 4 meters away on the edge of a talus slope on a NW facing canyon wall. I hadnt seen the snake before hearing the rattle and it took me a while to find it. We got pictures and then left it alone on a rock outcrop.; Coordinate Uncertainty in Meters: 29039.00000.

Dona Ana, New Mexico: 32.345597, -106.48426: : 7/23/2025: LittleBlackCat: 23 Jul 2025 ; Coordinate Uncertainty in Meters: 29120.00000.

Bernalillo, New Mexico: 35.209631, -106.46089: : 7/19/2026: Aidan Raver: 19 Jul 2026 ; Coordinate Uncertainty in Meters: 7.00000.