Venomous snakes in Idaho
Venomous snakes living in Idaho
1species
Western rattlesnake. A bite from the western rattlesnake is a medical emergency.
How to recognize them
Western rattlesnake Crotalus oreganus
- Brown, gray or olive with darker blotches down the back
- Blotches turn to bands toward the rattle
- Pale line from behind the eye to the jaw
Every venomous snake species known from the US is on this site.
Counties with records
- None recorded
- 1 species
- 2
- 3 to 4
- 5 or more
Active months
Harmless snakes people mistake for them
- Rattlesnake vs Gopher Snake Gopher snake: harmless
Quick answers
Questions
How many venomous snakes are in Idaho?
1 species live in the state: Western rattlesnake.
Which venomous snakes in Idaho are dangerous?
Western rattlesnake: a bite is a medical emergency.
When are venomous snakes most active in Idaho?
Most open records fall in April to June.
Which harmless snakes get mistaken for venomous ones in Idaho?
Gopher snake. See the side-by-side comparisons below.