DistributionRead full entry
Global Range: (200,000 to >2,500,000 square km (about 80,000 to >1,000,000 square miles)) Native range encompasses the Atlantic Slope from the St. Lawrence River drainage, Quebec, to Lake Okeechobee, Florida; Gulf drainages west to the Brazos River, Texas; Mississippi River and Great Lakes basins north to Nebraska, Wisconsin, Michigan, and southern Ontario; absent in Appalachian uplands (Lee et al. 1980, Page and Burr 2011). The species has been introduced in various localities in the western United States (e.g., Washington, California, Colorado) and eastern United States.
Subspecies americanus: Atlantic Slope drainages south to southern Georgia. Subspecies vermiculatus: remainder of range, with intergradation in most of Florida and in Gulf Slope drainages west to the Pascagoula River.