New Mexico
Snakes in San Miguel County
25 species have been documented here, 2 of them venomous.
Venomous snakes in San Miguel County
Full guide & what to do if bitten →
Western Diamond-backed RattlesnakeCrotalus atroxVenomousHeavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Prairie RattlesnakeCrotalus viridisVenomousHeavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Every snake recorded in San Miguel County
Western Terrestrial Garter Snake
Thamnophis elegans
Harmless
Checkered Garter Snake
Thamnophis marcianus
Harmless
Ground Snake
Sonora semiannulata
Harmless
Western Diamond-backed Rattlesnake
Crotalus atrox
Venomous
Gopher Snake
Pituophis catenifer
Harmless
Lined Snake
Tropidoclonion lineatum
Harmless
Common Coachwhip
Masticophis flagellum
Harmless
Ring-necked Snake
Diadophis punctatus
Harmless
Prairie Rattlesnake
Crotalus viridis
Venomous
Texas Blind Snake
Rena dulcis
Harmless
Long-nosed Snake
Rhinocheilus lecontei
Harmless
Plains Garter Snake
Thamnophis radix
Harmless
Pine Snake
Pituophis melanoleucus
Harmless
Plains Black-headed Snake
Tantilla nigriceps
Harmless
Smooth Greensnake
Opheodrys vernalis
Harmless
Black-necked Garter Snake
Thamnophis cyrtopsis
Harmless
Glossy Snake
Arizona elegans
Harmless
Red Cornsnake
Pantherophis guttatus
Harmless
Eastern Kingsnake
Lampropeltis getula
Harmless
Striped Whipsnake
Masticophis taeniatus
Harmless
Great Plains Ratsnake
Pantherophis emoryi
Harmless
Western Milksnake
Lampropeltis gentilis
Harmless
Desert Kingsnake
Lampropeltis splendida
Harmless
Plains Hognose Snake
Heterodon nasicus
Harmless
Great Plains Ground Snake
Sonora episcopa
Harmless
Compiled from verified GBIF & iNaturalist observations. Informational only.
Snakes in San Miguel County: FAQ
- Are there venomous snakes in San Miguel County, New Mexico?
- Yes. 2 venomous snake species have verified records in San Miguel County, New Mexico, including Western Diamond-backed Rattlesnake, Prairie Rattlesnake. Most snakes in San Miguel County, New Mexico, however, are harmless.
- How many snake species live in San Miguel County, New Mexico?
- 20+ snake species have verified records in San Miguel County, New Mexico, of which 2 are venomous.
- What is the most commonly seen snake in San Miguel County, New Mexico?
- The Western Terrestrial Garter Snake is the most frequently reported snake in San Miguel County, New Mexico, based on verified wildlife observations.
- What should I do if I see a venomous snake in San Miguel County, New Mexico?
- Keep your distance and do not try to catch or kill it. Most bites happen when people handle or corner a snake. If someone is bitten, contact local emergency services or poison control immediately.