I’m leaning yellowbellied. It just wasn’t cantankerous to be a moccasin, and I’ve ran across at least a hundred.
Moccasins don’t run, they run AT you, flashing their mouth the whole time.
And they’re fat from head to (especially) butt, with short, skinny tails.
The one TX way is to smell it. Moccasins stink to hell - an undescribably rank, putrid scent that no other live snake possesses. If HG’s snake has no scent, it’s probably not a moccasin.
http://www.texassnakes.net/YellowBellied.htm
That’s my husband’s company website! :) And yes, the snake in the first post is the yellow-bellied water snake.