Colorado
Snakes in Costilla County
4 species have been documented here, 1 of them venomous.
Venomous snakes in Costilla 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.
Every snake recorded in Costilla County
Prairie Rattlesnake
Crotalus viridis
Venomous
Gopher Snake
Pituophis catenifer
Harmless
Western Terrestrial Garter Snake
Thamnophis elegans
Harmless
Western Milksnake
Lampropeltis gentilis
Harmless
Compiled from verified GBIF & iNaturalist observations. Informational only.