Snakes in Allegheny County

• 
  Eastern Copperhead

  Agkistrodon contortrix

  ▲ Venomous

  Heavy body, triangular head, vertical pupils, and a heat-sensing pit between each eye and nostril.

• 
  Timber Rattlesnake

  Crotalus horridus

  ▲ Venomous

  Heavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.

• 
  Eastern Massasauga

  Sistrurus catenatus

  ▲ Venomous

  Stout, dark-blotched body, nine large scales on the crown, and a small rattle.

Every snake recorded in Allegheny County

Common Garter Snake

Thamnophis sirtalis

Harmless

Gray Ratsnake

Pantherophis spiloides

Harmless

Common Watersnake

Nerodia sipedon

Harmless

DeKay's Brownsnake

Storeria dekayi

Harmless

Queensnake

Regina septemvittata

Harmless

Eastern Milksnake

Lampropeltis triangulum

Harmless

Ring-necked Snake

Diadophis punctatus

Harmless

Eastern Copperhead

Agkistrodon contortrix

▲ Venomous

Western Ratsnake

Pantherophis obsoletus

Harmless

Common Ribbon Snake

Thamnophis saurita

Harmless

North American Racer

Coluber constrictor

Harmless

Short-headed Garter Snake

Thamnophis brachystoma

Harmless

Kirtland's Snake

Clonophis kirtlandii

Harmless

Smooth Greensnake

Opheodrys vernalis

Harmless

Red-bellied Snake

Storeria occipitomaculata

Harmless

Eastern Hognose Snake

Heterodon platirhinos

Harmless

Red Cornsnake

Pantherophis guttatus

Harmless

Rough Greensnake

Opheodrys aestivus

Harmless

Timber Rattlesnake

Crotalus horridus

▲ Venomous

Common Wormsnake

Carphophis amoenus

Harmless

Eastern Massasauga

Sistrurus catenatus

▲ Venomous

Smooth Earthsnake

Virginia valeriae

Harmless

Compiled from verified GBIF & iNaturalist observations. Informational only.

Nearby counties