Yesterday I came across this Watersnake moving through the grass near a gate on my property. I believe it was moving from one small stream to another. These snakes like frogs and I have heard lots of them around these small streams. The stream it was coming from only has water when it rains and it had rained a few days ago.
I believe this is a Plain-bellied Watersnake from what I can tell from my research on my favorite site in reference to snakes in Arkansas: Herps of Arkansas
Plain-bellied Watersnake Facts
This species preys primarily upon frogs. Small fish make up most of the remaining portion of the diet.
This species relies upon its stealth and ability to remain submerged for long periods of time to catch its prey. It will actively search through underwater rock crevices and vegetation for its prey, lunging after what it can grasp. A successful bite usually hooks the fin of a fish or foot of a frog. Larger prey is dragged out of the water and eaten on the bank. If, after the prey has stopped struggling, the snake decides to seek out the head–it goes down easier!–a carefully timed flop or jump can leave the snake without a meal. This species has been observed hanging from a tree with its head in the water and catching fish that would swim by.
Due to its aggressive defensive behavior, it is commonly mistaken for the venomous Cottonmouth. (Herps of Arkansas)