A beaver has been chewing down several aspens near the visitor center. I love it. We don't see many although we have a lovely pond; usually we have the smaller muskrats. So I was excited to come to work one day and see one tree chewed down...then another, and then another. The rangers aren't that happy about it, and if they can find it, they will likely "relocate" it.
But in the meantime I get to enjoy the handy work of this hungry little guy.