South Dakota
Snakes in Butte County
5 species have been documented here, 1 of them venomous.
Venomous snakes in Butte County
Full guide & what to do if bitten →
Prairie RattlesnakeCrotalus viridisVenomousHeavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Every snake recorded in Butte County
Western Terrestrial Garter Snake
Thamnophis elegans
Harmless
Plains Garter Snake
Thamnophis radix
Harmless
Prairie Rattlesnake
Crotalus viridis
Venomous
Gopher Snake
Pituophis catenifer
Harmless
North American Racer
Coluber constrictor
Harmless
Compiled from verified GBIF & iNaturalist observations. Informational only.