Pennsylvania
Snakes in Sullivan County
11 species have been documented here, 1 of them venomous.
Venomous snakes in Sullivan 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 Sullivan County
Common Garter Snake
Thamnophis sirtalis
Harmless
Ring-necked Snake
Diadophis punctatus
Harmless
Common Watersnake
Nerodia sipedon
Harmless
Red-bellied Snake
Storeria occipitomaculata
Harmless
Timber Rattlesnake
Crotalus horridus
Venomous
Eastern Milksnake
Lampropeltis triangulum
Harmless
Smooth Greensnake
Opheodrys vernalis
Harmless
DeKay's Brownsnake
Storeria dekayi
Harmless
Eastern Ratsnake
Pantherophis alleghaniensis
Harmless
Western Ratsnake
Pantherophis obsoletus
Harmless
Gray Ratsnake
Pantherophis spiloides
Harmless
Compiled from verified GBIF & iNaturalist observations. Informational only.