Just thought I would share a story. Bob is here, giving my furnace a tune-up. He hunts duck on the Delaware River in and around Philadelphia and told me that he often sees very large beaver living in the river banks, and inside the abandoned piers. He said the beaver are as "big as my dog", who goes crazy when he spots them swimming around. I assumed beaver only live in beaver ponds and beaver lodges in the forest. The Marine Police rode up on Bob and his friend once because of reports of gunfire on the river. After checking their Pennsylvania hunting license the police told them hunting on the river is fine as long as they do not go near a particular island close to Philadelphia airport.