Pine snake - http://dnr.wi.gov/eek/critter/reptile/foxsnake.htm Bull Snake - http://dnr.wi.gov/eek/critter/reptile/bullsnake.htm I live in the North so I only have Pine snakes, but the ones in my area, at least, will rattle their tail against leaves and grass like a bull snake. I have video to prove it! Either way, something that moves fast across land without legs has got to be evil.