very nice, some exposure issues, or maybe it's post processing, but overall they are good, particularly because of the difficulty of photographing beaver. I like best, the one with the rock in the background, fine job! I like the grean reflection off the water in the last shot. I think these shots are righ in that range of too far away, or too close. I think pulling back or getting closer, and down lower to the water would help a lot! Eye level with those beaver would also get you some backgrounnd!
In most places beaver come out at night and almost never when people are present. I'd say keep at it. With such a fine resouce near your home, you could become the next great beaver photographer!