This species is endemic to the United States. The eastern segment of the range (subspecies longicaudus) encompasses the southeastern United States, from Virginia and Kentucky to the Gulf Coast and southern Florida, east of the Mississippi River; the western part of the range (subspecies attentuatus) extends from southeastern Nebraska, Iowa, Wisconsin, and Indiana south to the Gulf Coast of Texas and Louisiana, west of the Mississippi River in the south (Conant and Collins 1991).