If you drive by Rieck's Lake just north of Alma on Wisconsin Hwy 37 you can see white spots where the snow had settled on the roofs of the muskrat huts. You couldn't see them until it snowed because the huts were tucked up behind grasses and high spots out of the way of the high waters of the lake and the unusally swift currents coming down the Buffalo River to the Mississippi. Huts are used for communal living and for food storage.
Take note of the muskrat trails from hut to hut. I love this shot showing the sway in the trail formed by the muskrat scooting from left to right in the 6 inches of snow.
This is a great nature view for kids and a real learning opportunity. For more "kid friendly" info on muskrats visit the DNR Critter Corner.