I need to scan the pic, but I found a tree that had been knawed by beavers in the strangest way, I call it the beaver ball. The little buggers had chewed almost all the way thru in two places, one spot about 1.5' above the other, and the wood in between was debarked and almost totally round, it looked like a wooden basketball. I'll pull the pic from my album tonight and try to take into work tomorrow to scan it, its really bizarre, almost looks like one beaver was standing on the others back and they were both chewing away.