99% of the bugs, snakes, reptiles, etc. I have no problem with. I've even had a few pet snakes. There are only a few things I'll kill on site. Copperheads, Rattlesnakes, Roaches, ants, gnats, flies, and ESPECIALLY asian lady beetles (those little fockers that look like lady bugs but bite and swarm), and stink bugs. Both of those last two have become a real nuisance around here as they've moved in and there are no known predators for each and they are EVERYWHERE!