Pennsylvania
Snakes in Westmoreland County
16 species have been documented here, 2 of them venomous.
Venomous snakes in Westmoreland County
Full guide & what to do if bitten →
Eastern CopperheadAgkistrodon contortrixVenomousHeavy body, triangular head, vertical pupils, and a heat-sensing pit between each eye and nostril.
Timber RattlesnakeCrotalus horridusVenomousHeavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Every snake recorded in Westmoreland County

Common Garter Snake
Thamnophis sirtalis
Harmless

Queensnake
Regina septemvittata
Harmless

Common Watersnake
Nerodia sipedon
Harmless

Gray Ratsnake
Pantherophis spiloides
Harmless

Ring-necked Snake
Diadophis punctatus
Harmless

DeKay's Brownsnake
Storeria dekayi
Harmless

Eastern Copperhead
Agkistrodon contortrix
Venomous

Timber Rattlesnake
Crotalus horridus
Venomous

Eastern Milksnake
Lampropeltis triangulum
Harmless

Red-bellied Snake
Storeria occipitomaculata
Harmless

Western Ratsnake
Pantherophis obsoletus
Harmless

North American Racer
Coluber constrictor
Harmless

Smooth Greensnake
Opheodrys vernalis
Harmless

Smooth Earthsnake
Virginia valeriae
Harmless

Common Wormsnake
Carphophis amoenus
Harmless

Kirtland's Snake
Clonophis kirtlandii
Harmless
Compiled from verified GBIF & iNaturalist observations. Informational only.