Nerodia taxispilota

The Brown Watersnake is one of the largest of the Nerodia species  measuring approximately 30-60 in (76-152 cm) and fairly heavy-bodied.

Coloration is generally light to dark brown with large dark brown square blotches. One line of square blotches runs down center of the back and two other lines run in alternating rows along the sides of the body. The belly is usually light with brown splotches and black crescents. Like all watersnakes, brown watersnakes have strongly keeled scales, the anal plate is divided, the head visibly wider than neck, giving it a slightly triangular appearance. Additionally, the eyes are high on the head and close to the tip of the nose.

Females are much larger than males.

The brown watersnake is widely-distributed in the Coastal Plain and Piedmont regions of the Southeast from southern Virginia south through all of Florida. West of eastern Alabama this species is replaced by the closely-related diamondback watersnake (Nerodia rhombifer). Brown watersnakes are found throughout Georgia and South Carolina with the exception of mountainous regions of extreme northwestern South Carolina and northern Georgia.

Although they may be found in a variety of aquatic habitats, they are most common in flowing water such as rivers, canals, and blackwater cypress creeks.

I have noticed that this species in particular likes water, they will just sit in there water bowls for hours at a time!

Also the preference for fish in their diet  is stronger than other water snakes.