None at all -- in the foothill area on the outskirts they get rattlesnakes and I think king snakes, but all we get around here are -- rats! We don't even have squirrels in our area. And since I once had a pet rat I can't hate them like I do the slithery ones, although luckily I have several cats who keep the local rat population thinned out. The house behind us has been vacant for a while, so I think that might be a source, and I can sure tell when there's one around because the cats don't want to come in and just sit there and stare at one particular area -- so I clear out and won't come back until it's over!