Venomous snakes in Montana
Venomous snakes living in Montana
1species, plus 1 with rare records
Prairie rattlesnake. A bite from the prairie rattlesnake is a medical emergency.
How to recognize them
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
Rare records
- Rare records Western diamondback rattlesnake 4 open records, latest 1973
Harmless snakes people mistake for them
Quick answers
Questions
How many venomous snakes are in Montana?
1 species live in the state: Prairie rattlesnake.
Which venomous snakes in Montana are dangerous?
Prairie rattlesnake: a bite is a medical emergency.
When are venomous snakes most active in Montana?
Most open records fall in June, September.