Venomous snakes in Wyoming
Venomous snakes living in Wyoming
2species
Western rattlesnake, Prairie rattlesnake. A bite from any of these is a medical emergency.
How to recognize them
Western rattlesnakeDangerous31 records, 3 counties
Prairie rattlesnakeDangerous300 records, 17 counties
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
Prairie rattlesnake Crotalus viridis
- Greenish gray to brown with dark blotches down the back
- Blotches narrow into bands near the tail
- Two pale lines on the side of the face
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 Wyoming?
2 species live in the state: Western rattlesnake and Prairie rattlesnake.
Which venomous snakes in Wyoming are dangerous?
Western rattlesnake and Prairie rattlesnake: a bite is a medical emergency.
When are venomous snakes most active in Wyoming?
Most open records fall in June, October.
Which harmless snakes get mistaken for venomous ones in Wyoming?
Gopher snake. See the side-by-side comparisons below.