SNAKE

A few mornings ago I opened the back door and allowed Sunny to pass. A typical, daily routine. Many times a day to be precise. She was already out the door when I saw the snake. It didn't have a problem with Sunshine passing but when I stepped out to attempt a better picture the bugger took off. So, does anyone know what type of snake this is??? Our backyard is currently a haven for snakes. Unintentionally mind you. David really doesn't like snakes. They don't much bother me but I realize we have many poisonous snakes here so I attempt to be cautious.