Know the dangerous ones
Venomous snakes in Mercer County, Pennsylvania
2 venomous snake species have verified records in Mercer County. Learn to recognize each one, and know what to do if you are bitten.
Field entries
Sistrurus catenatus Eastern MassasaugaVenomousSistrurus catenatus
How to identify
Stout, dark-blotched body, nine large scales on the crown, and a small rattle.
Occasionally seenFull profile →
Agkistrodon contortrix Eastern CopperheadVenomousAgkistrodon contortrix
How to identify
Heavy body, triangular head, vertical pupils, and a heat-sensing pit between each eye and nostril.
Rarely seenFull profile →
Looking for all snakes here, not just the venomous ones? See all snakes in Mercer County.