Crotalus horridus, commonly known as timber rattlesnake, canebrake rattlesnake or banded rattlesnake, is a species of venomous pit viper found in the eastern United States. This is the only rattlesnake species in most of the populous northeastern United States and is second only to its cousins to the west, the prairie rattlesnake, as the most northerly distributed venomous snake in North America. (source)