Solid Colored Snakes

This is a heavy-bodied snake averaging 2 to 3 feet in length.
Adult coloration can be almost all black, with a little bit of brown, or they can appear as black and brown banded.  The juvinile pattern is much more pronounced with the tip of the tail a greenish yellow.  This snake isn't common to the Austin area.  I've never seen one here in Travis County, but I get a lot of calls from people who think that they have seen one, and it has always been a water snake.  They have never been recorded in Williamson County.

The Cottonmouth likes slow moving water or quiet ponds without a lot of human activity, they feed on frogs, fish, rodents, and birds.  They like to sit very still and blend into their surroundings.  If bothered, they will first try to get away, but if cornered they will be open their mouth and gape, showing their characteristic white mouth.  Most snakes have a white mouth, so this is not a way to identify this snake.  When sitting in the water, their entire body floats on the top of the water, as opposed to harmless water snakes, whose bodies will be below the surface of the water.

Juveniles have a distinctive banding pattern and, like copperheads, a bright green tail tip.  As they get older, they tend to darken up, losing much of this banding pattern and becoming almost solid colored and losing the green color on the tail.

This is a large, slender snake averaging 4 to 6 feet in length.
They range in color from solid brown or solid tan to wide brown and tan bands. They can move very quickly and feed on reptiles, rodents, and birds. If cornered they can raise the front one-third of their bodies off the ground and they will bite, although they aren't venomous. They will also 'play dead' sometimes.

The adults average 3 to 4 feet in length.
Adults are olive to light green on top with a yellow belly.  Juveniles are blotched patterned with a brown or gray background. They feed on reptiles and sometimes rodents and birds.  When they are in the tall grass, they tend to hold their head high up above the grass for observation, similar to a periscope on a submarine.