South Dakota
Snakes in Haakon County
6 species have been documented here, 1 of them venomous.
Venomous snakes in Haakon 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 Haakon County
Gopher Snake
Pituophis catenifer
Harmless
Western Milksnake
Lampropeltis gentilis
Harmless
Plains Hognose Snake
Heterodon nasicus
Harmless
North American Racer
Coluber constrictor
Harmless
Prairie Rattlesnake
Crotalus viridis
Venomous
Plains Garter Snake
Thamnophis radix
Harmless
Compiled from verified GBIF & iNaturalist observations. Informational only.