I've recently caught two snakes in two different places in Texas.
First, I caught what I believe to be either a bull snake or a gopher snake. There is a black band that goes over it's hand near the tip. It's light brown with darker brown spots going along it's length. It was caught in Williamson county, to be exact right outside of the Dell buildings. Also, this snake is very aggresive and shakes its tail as if it were a rattlesnake.
Second snake is more of an unknown. It was caught in San Antonio. It is not at all agressive. It's coloring is more of a rust color. It has almost a checkered pattern to it alternating rust and brown spots go down its length. Also, on it's head are two white dots and one dot on its neck.