Water Snakes
Water Snakes, snakes that live chiefly in water. With the exception of the water moccasin, all water snakes in the United States are harmless to humans. They are stout-bodied, large-headed snakes that live on fish, frogs, tadpoles, salamanders, insects, and earth worms. The various species range from 22 inches to 6 feet (56 to 183 cm) in length. The common water snake, light-brown and barred with darker bands, grows to 3 ½ feet (1 m) long.
The common water snake is Natrix sipedon sipedon of the family Colubridae.