Tracks from top to bottom: White Toed Mouse (& tail drag), bird wings flutter, Raccoon on porch steps.

To survive winter, some animals like birds, whales and senior citizens migrate south to warmer climes. Others stay put and adapt by thickening their fur, cacheing their food, or slipping into a comatose dormancy. A few go into deep hibernation whereby little could awaken them: if your luck brings you beyond the doorstep of a hibernating groundhog, shake him like mad and he's apt to just hang like a limp furry lump... breathing just once every 5 minutes. Others, like bears and teens, go into torpor and stir only to eat, poop, or snuggle with their boo. Most of us, and most wildlife, must keep hustling and bustling. Should you take a snowy walk in the woods, or nearly anywhere after snowfall, you may not see a lot of furry wildlife above the subnivian layer, but signs of their wild party will be plenty right atop, and most wonderfully, right under your foot.