What is "banded water snake"

n. in some classifications placed in the genus Nerodia; western United States snake that seldom ventures far from water [syn: common water snake, Natrix sipedon, Nerodia sipedon]

The banded water snake or southern water snake (Nerodia fasciata) is a species of mostly aquatic, nonvenomous, colubrid snake endemic to the central and southeastern United States.