Idaho
Snakes in Ada County
11 species have been documented here, 2 of them venomous.
Venomous snakes in Ada County
Full guide & what to do if bitten →
Western RattlesnakeCrotalus oreganusVenomousHeavy 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 Ada County
Gopher Snake
Pituophis catenifer
Harmless
Western Terrestrial Garter Snake
Thamnophis elegans
Harmless
Western Rattlesnake
Crotalus oreganus
Venomous
North American Racer
Coluber constrictor
Harmless
Striped Whipsnake
Masticophis taeniatus
Harmless
Common Garter Snake
Thamnophis sirtalis
Harmless
Pine Snake
Pituophis melanoleucus
Harmless
Prairie Rattlesnake
Crotalus viridis
Venomous
Northern Rubber Boa
Charina bottae
Harmless
Desert Nightsnake
Hypsiglena chlorophaea
Harmless
Ground Snake
Sonora semiannulata
Harmless
Compiled from verified GBIF & iNaturalist observations. Informational only.
Snakes in Ada County: FAQ
- Are there venomous snakes in Ada County, Idaho?
- Yes. 2 venomous snake species have verified records in Ada County, Idaho, including Western Rattlesnake, Prairie Rattlesnake. Most snakes in Ada County, Idaho, however, are harmless.
- How many snake species live in Ada County, Idaho?
- 11 snake species have verified records in Ada County, Idaho, of which 2 are venomous.
- What is the most commonly seen snake in Ada County, Idaho?
- The Gopher Snake is the most frequently reported snake in Ada County, Idaho, based on verified wildlife observations.
- What should I do if I see a venomous snake in Ada County, Idaho?
- 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.