Pennsylvania
Snakes in Jefferson County
12 species have been documented here, 1 of them venomous.
Venomous snakes in Jefferson 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 Jefferson County
Short-headed Garter Snake
Thamnophis brachystoma
Harmless
Common Garter Snake
Thamnophis sirtalis
Harmless
Red-bellied Snake
Storeria occipitomaculata
Harmless
Eastern Milksnake
Lampropeltis triangulum
Harmless
Ring-necked Snake
Diadophis punctatus
Harmless
Smooth Earthsnake
Virginia valeriae
Harmless
Common Watersnake
Nerodia sipedon
Harmless
Gray Ratsnake
Pantherophis spiloides
Harmless
Queensnake
Regina septemvittata
Harmless
Smooth Greensnake
Opheodrys vernalis
Harmless
Western Ratsnake
Pantherophis obsoletus
Harmless
Timber Rattlesnake
Crotalus horridus
Venomous
Compiled from verified GBIF & iNaturalist observations. Informational only.