New Mexico
Snakes in Los Alamos County
8 species have been documented here, 2 of them venomous.
Venomous snakes in Los Alamos County
Full guide & what to do if bitten →
Prairie RattlesnakeCrotalus viridisVenomousHeavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Western Diamond-backed RattlesnakeCrotalus atroxVenomousHeavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Every snake recorded in Los Alamos County
Gopher Snake
Pituophis catenifer
Harmless
Western Terrestrial Garter Snake
Thamnophis elegans
Harmless
Prairie Rattlesnake
Crotalus viridis
Venomous
Western Diamond-backed Rattlesnake
Crotalus atrox
Venomous
Great Plains Ratsnake
Pantherophis emoryi
Harmless
Common Coachwhip
Masticophis flagellum
Harmless
Striped Whipsnake
Masticophis taeniatus
Harmless
Black-necked Garter Snake
Thamnophis cyrtopsis
Harmless
Compiled from verified GBIF & iNaturalist observations. Informational only.
Snakes in Los Alamos County: FAQ
- Are there venomous snakes in Los Alamos County, New Mexico?
- Yes. 2 venomous snake species have verified records in Los Alamos County, New Mexico, including Prairie Rattlesnake, Western Diamond-backed Rattlesnake. Most snakes in Los Alamos County, New Mexico, however, are harmless.
- How many snake species live in Los Alamos County, New Mexico?
- 8 snake species have verified records in Los Alamos County, New Mexico, of which 2 are venomous.
- What is the most commonly seen snake in Los Alamos County, New Mexico?
- The Gopher Snake is the most frequently reported snake in Los Alamos County, New Mexico, based on verified wildlife observations.
- What should I do if I see a venomous snake in Los Alamos 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.