Nerodia sipedon pleuralis
Pulaski Co., Illinois. May 9, 1999.
This subspecies is delineated from northern water snakes by the number of dorsal bands and blotches, and there is a wide area of intergradation across the midwestern US. Photos are of a ‘true’ pleuralis from Jefferson Co., Kentucky. Regardless of subspecies, any creek with fish and frogs will have a population of sipedon, and large adults are often spotted basking in brushy log jams near the water.
HerpMapper records for this species are here.