Growing up on about 4 acres in Tomball (plus a lot of woods surrounding belonging to the neighbors) we saw/caught a lot of snakes; mainly ratsnakes, lots of hognoses, copperheads, some cottonmouths. One day we found a snake we couldn't quite identify at the time. Over the course of a couple of days, my dad got a call from a friend of a friend. Turns out he was a herpetologist/zoologist at the Houston Zoo and knew what the snake was based off the description he had received. He was putting together a book on local snakes and had figured out we had a buttermilk racer in our possession. Beautiful snake with a nasty temper, struck at anything that moved. He was mainly green with white specks sporadically located throughout his body. Long story short had an assistant come and pick up the snake so he could photograph it and include it in his book, in turn this young snake obsessed boy got a backstage tour of the Houston Zoo reptile house.
He returned the snake to us after he was done with it and in turn we let it go again. As a kid I wanted to keep him regardless of the fact that I really couldn't handle him, but they are apparently not good captive snakes at all, refused to eat.
Cool story bra, I know.... tried to find pics, but couldn't.
Looked something like this, I seem to remember it being a little bit brighter green. This was many years ago however.