Alan your right about the cottonmouth,copperhead being agressive. I don't like a snake that will chase you and strike when not threatened.They are dangerous to young kids that don,t know any better than to prevoke them.It is not a good chance to take leaving these types of hazards around.You have enough things to worry about. If you have a rodent problem cut back the brush keep the suroundings mowed and buy a cat. DOC