Central part of the state. The diamondback water snake
is the largest and most aggressive water snake in Oklahoma. Easily
distinguished from the other species of water snakes, the diamondback
has typically a dark green to brown body ground color with a black
net-like pattern, forming a rhomboid pattern, giving this species
its name. Like all water snakes, they are found near water, but
may wander far from water in search of food, which includes fish,
frogs, salamanders, and crustaceans.
*Water snakes are easily distinguished from the venomous cottonmouth
in that they have round pupils, with eyes set higher on top of the
head, typically a very yellow lower jaw and throat, and each labial
scale has a very noticeable black edge.