North American pit vipers

Pit vipers belong to the family Viperidae (Vipers), subfamily Crotalinae (Pit Vipers). The following list of pit viper species and subspecies found in the United States and Canada is based on the master list of The Center for North American Herpetology. The links to the corresponding Wikipedia pages are added when available to facilitate finding additional information about these species, but linking to external pages does not imply that all information on those pages is fully correct.

The Book
“Early identification of downward trends is key to treatment.”