Here is what he said about the dead beaver with lots of notches in its tail,
"That is just usual beaver on beaver chewing. Pretty common. Plus lots of scars likely under the fur if it were skinned out. Being a beaver is a hard lot. Beaver are very territorial and with the high beaver population there is a lot of fighting among beavers. There is little unoccupied territory for a young beaver to move into. Since April is the big dispersal month, death from territorial fights is not uncommon."Eric recommends having a few beaver trapped each year to maintain a healthy, and not overpopulated beaver population. Eric also posts a blog at New Hampshire Nature Notes.
Beaver have huge incisors that they use to gnaw down huge trees. Clearly they also use those massive teeth to bite each other. If you look at the photo that I posted yesterday you can now envision two big teeth marks among the smaller ones. This beaver was in some serious fights.