Colorado
Snakes in Costilla County
3 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
Compiled from verified GBIF & iNaturalist observations. Informational only.
Snakes in Costilla County: FAQ
- Are there venomous snakes in Costilla County, Colorado?
- Yes. 1 venomous snake species has verified records in Costilla County, Colorado, including Prairie Rattlesnake. Most snakes in Costilla County, Colorado, however, are harmless.
- How many snake species live in Costilla County, Colorado?
- 3 snake species have verified records in Costilla County, Colorado, of which 1 is venomous.
- What is the most commonly seen snake in Costilla County, Colorado?
- The Prairie Rattlesnake is the most frequently reported snake in Costilla County, Colorado, based on verified wildlife observations.
- What should I do if I see a venomous snake in Costilla County, Colorado?
- 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.