Iowa
Snakes in Polk County
18 species have been documented here, 1 of them venomous.
Venomous snakes in Polk County
Full guide & what to do if bitten →
Timber RattlesnakeCrotalus horridusVenomousHeavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Every snake recorded in Polk County
Common Watersnake
Nerodia sipedon
Harmless
Common Garter Snake
Thamnophis sirtalis
Harmless
DeKay's Brownsnake
Storeria dekayi
Harmless
Western Foxsnake
Pantherophis ramspotti
Harmless
Plains Garter Snake
Thamnophis radix
Harmless
Western Ribbon Snake
Thamnophis proximus
Harmless
Gopher Snake
Pituophis catenifer
Harmless
North American Racer
Coluber constrictor
Harmless
Graham's Crawfish Snake
Regina grahamii
Harmless
Lined Snake
Tropidoclonion lineatum
Harmless
Smooth Earthsnake
Virginia valeriae
Harmless
Eastern Milksnake
Lampropeltis triangulum
Harmless
Smooth Greensnake
Opheodrys vernalis
Harmless
Ring-necked Snake
Diadophis punctatus
Harmless
Timber Rattlesnake
Crotalus horridus
Venomous
Eastern Hognose Snake
Heterodon platirhinos
Harmless
Common Ribbon Snake
Thamnophis saurita
Harmless
Eastern Foxsnake
Pantherophis vulpinus
Harmless
Compiled from verified GBIF & iNaturalist observations. Informational only.