Thanks for the extra info. This summer in the BWCA we startled a beaver on the bank, the first time I'd seen one so far out of water. It seemed quick but clumsy, it decided hiding behind a small bush was its best defense. I can see why wolves would predate them. I wonder how forest fires play into this as well. We noticed in areas that were burned ~5-15 years ago there were tons of young trees there were so many beavers.