is the copperhead a rattlesnake
The Catskill Mountains have two poisonous snakes. The Timber Rattlesnake (Crotalus horridus) and the Northern Copperhead (Agkistrodon contortrix mokasen). 1  Timber Rattlesnake - Overlook Mountain (from the Overlook Mountain House to the fire tower).  Timber Rattlesnake - Echo Lake (near Overlook Mountain).