Amy, having been bitten a few times, don't mess with them. I've never been bitten by a poisonous one yet thank goodness. The Wife killed two snakes this week in the barn. I was bitten this spring while mowing my back yard. I didn't kill that one. It was a black snake and I stepped on it. My fault and it eats mice etc. and is good for our place. Of course, I did get hacked off some. I killed another one that bit me this spring but I don't know what it is. It was hanging from a tree and I knocked it out of the branch. It got me on the way down. Stupid me. It is in a million pieces now.
Cannonball, the only snake in Illinois that can kill you is the cotton mouth. You are the only person I have ever heard of getting bit by those harmless snakes. We used to catch them, as kids in Shelby Co. and take them to school.