A large, nonvenomous snake endemic to the southeastern United States, most often found in rivers and streams. Brown water snakes have several rows of strongly-keeled, dark brown dorsal scales spanning from head to tail that are suitable for swimming, and ventral scales that are a much lighter shade of brown. Their heads are very wide (relative to their necks) with a pair of eyes and nostrils located abnormally high on their heads, providing a tactical advantage while swimming. The triangular shape of brown water snakes’ heads gives them a similar appearance to venomous snakes indigenous to the same regions.