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).
Read more about this topic: Agkistrodon Contortrix
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“The Canadians of those days, at least, possessed a roving spirit of adventure which carried them further, in exposure to hardship and danger, than ever the New England colonist went, and led them, though not to clear and colonize the wilderness, yet to range over it as coureurs de bois, or runners of the woods, or, as Hontan prefers to call them, coureurs de risques, runners of risks; to say nothing of their enterprising priesthood.”
—Henry David Thoreau (1817–1862)