wondering if any hunters on here can help me with setting up some snares.

I've never been hunting or used a snare before, but I recently discovered I've got a big rat problem in my back garden. I don't want to use poison because I have a ton of other wildlife in my garden that I don't want to kill, but the rats are a real problem.

Maybe if someone could post an infopic of some types of snares or something I could set a couple up near where they like to live in my shed.