Noun
A common North American colubrine snake (Tropidonotus sipedon) which lives chiefly in the water.
Any species of snakes of the family Homalopsidae, all of which are aquatic in their habits.
Source: Webster's dictionaryThe Lake Erie water snake, a subspecies of the northern water snake ( Nerodia sipedon ), lives in the vicinity of Ohio's Put-in-Bay Harbor, and had been put on the threatened species list. Source: Internet
By 2010, the water snake population was over 12,000 snakes. Source: Internet