Know the dangerous ones
Venomous snakes in Allegheny County, Pennsylvania
3 venomous snake species have verified records in Allegheny County. Learn to recognize each one, and know what to do if you are bitten.
Field entries
Agkistrodon contortrix Eastern CopperheadVenomousAgkistrodon contortrix
How to identify
Heavy body, triangular head, vertical pupils, and a heat-sensing pit between each eye and nostril.
Often seenFull profile →
Crotalus horridus Timber RattlesnakeVenomousCrotalus horridus
How to identify
Heavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Rarely seenFull profile →
Sistrurus catenatus Eastern MassasaugaVenomousSistrurus catenatus
How to identify
Stout, dark-blotched body, nine large scales on the crown, and a small rattle.
Rarely seenFull profile →
Looking for all snakes here, not just the venomous ones? See all snakes in Allegheny County.