Great idea from Elwood Lightfoot from the forum on Backyard chickens. He shares that using a minnow trap is the perfect way of catching snakes around the chicken coop. He had a lot of snakes. Ewww they make me shudder. I am so not a reptile person. If you are raising chickens you may wish to join the forum. Lots of good folks sharing good info.
http://www.backyardchickens.com/t/515899/best-way-ive-found-yet-to-deal-with-snake-problems