Agkistrodon Contortrix - Geographic Range

Geographic Range

It is found in the United States in the states of Alabama, Arkansas, Connecticut, Delaware, Florida, Georgia, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Texas, Ohio, Oklahoma, Maryland, Massachusetts, Mississippi, Missouri, New Jersey, New York, North Carolina, Pennsylvania, South Carolina, Tennessee, Virginia and West Virginia. In Mexico, it occurs in Chihuahua and Coahuila. The type locality is "Carolina". Schmidt (1953) proposed the type locality be restricted to "Charleston, South Carolina".

Unlike some other species of North American pit vipers, such as Crotalus horridus and Sistrurus catenatus, Agkistrodon contortrix has not reestablished itself north of the terminal moraine after the last glacial period (the Wisconsin glaciation), except it is found in southeastern New York State and southern New England, an area north of Long Island (the terminal moraine of the Wisconsin glaciation).