To continue my conversation (i am coming from my elk post), there are several good websites on Muskrats.Ondatra zibethicus
Yesterday i found two push-ups on moose skull lake. I always wonder how will they make it through the winter, as i think this lake freezes solid (no fish). But every year there are these push-ups in the beginning of the winter?? I my self are going back to that website. Always so little i know.
ps. It's a bird who made the prints. And carried something off, I found pieces of material from the push-up farther on the lake, obviously being dropped from the sky.