New Mexico
Snakes in Los Alamos County
15 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
No photo
Mexican Whip Snake
Masticophis lineatus
Harmless
Great Plains Ratsnake
Pantherophis emoryi
Harmless
Common Coachwhip
Masticophis flagellum
Harmless
Striped Whipsnake
Masticophis taeniatus
Harmless
Black-necked Garter Snake
Thamnophis cyrtopsis
Harmless
Sinaloan Nightsnake
Hypsiglena torquata
Harmless
Ring-necked Snake
Diadophis punctatus
Harmless
California King Snake
Lampropeltis californiae
Harmless
Smooth Greensnake
Opheodrys vernalis
Harmless
Chihuahuan Nightsnake
Hypsiglena jani
Harmless
Pine Snake
Pituophis melanoleucus
Harmless
Compiled from verified GBIF & iNaturalist observations. Informational only.