Idaho
Snakes in Madison County
5 species have been documented here, 1 of them venomous.
Venomous snakes in Madison 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.
Every snake recorded in Madison County
Western Terrestrial Garter Snake
Thamnophis elegans
Harmless
Gopher Snake
Pituophis catenifer
Harmless
North American Racer
Coluber constrictor
Harmless
Western Rattlesnake
Crotalus oreganus
Venomous
Northern Rubber Boa
Charina bottae
Harmless
Compiled from verified GBIF & iNaturalist observations. Informational only.
Snakes in Madison County: FAQ
- Are there venomous snakes in Madison County, Idaho?
- Yes. 1 venomous snake species has verified records in Madison County, Idaho, including Western Rattlesnake. Most snakes in Madison County, Idaho, however, are harmless.
- How many snake species live in Madison County, Idaho?
- 5 snake species have verified records in Madison County, Idaho, of which 1 is venomous.
- What is the most commonly seen snake in Madison County, Idaho?
- The Western Terrestrial Garter Snake is the most frequently reported snake in Madison County, Idaho, based on verified wildlife observations.
- What should I do if I see a venomous snake in Madison 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.