Illinois Natural History Survey - University of Illinois

Illinois has 4 species of venomous snakes, the massasauga rattlesnake, the timber rattlesnake, the copperhead, and the cottonmouth. In Illinois, massasaugas are primarily found in wet prairies and floodplain areas; timber rattlesnakes are typically found on the bluffs near the Mississippi and Illinois Rivers; cottonmouths are restricted to the swamps of extreme southern Illinois; and copperheads are found along the western edge of southern Illinois.



Illinois Natural History Survey

1816 South Oak Street, MC 652
Champaign, IL 61820

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