Tracks and Sign in the Winter Woods

Fresh snow turns the woods into a record of who went where overnight. You don’t need to identify every print to read it. Start with the pattern the trail makes, then the size, then where it goes. That gets you most of the way, and the details come with practice.

Four patterns

Animals move in a few basic ways, and each leaves its own pattern ¹:

• Diagonal walkers (“perfect steppers”): long legs, front and hind feet alike. The hind foot lands in the front foot’s print, so the trail is a nearly straight line of single prints. Deer, fox, coyote, bobcat, and dogs and cats walk this way ¹. A fox’s line is neater and narrower than a dog’s, which wanders.
• Pacers (waddlers): wide, heavy bodies on short legs move both legs on one side together, leaving a front and a hind print side by side in pairs. Raccoon, opossum, muskrat, woodchuck, and bear ¹.
• Bounders: long bodies and short legs. They leap and land with the hind feet in or next to the front prints, leaving repeating pairs or clusters. Weasel, mink, otter, and fisher ¹. An otter will also slide on its belly down banks.
• Gallopers (hoppers): big hind feet, small front feet. The hind feet swing past the front and land ahead and outside, so each set is four prints with the two big ones in front ¹. Rabbits, hares, squirrels, and mice. A squirrel’s trail goes tree to tree; a rabbit’s goes brush to brush.

Browse and other sign

Twigs tell you who’s been eating. Deer have no upper front teeth: they pinch a twig between their lower incisors and the hard pad above and tear it, so browsed twigs have ragged, torn ends ². Rabbits bite each twig off with one clean cut at a 45° angle ², and only as high as they can reach from the snow surface. Deep snow lets them reach higher. Bark gnawed off at the base of young trees, discovered after snowmelt, is usually voles working out of sight under the snow ².

Deer readily browse arborvitae and white pine, and in deep-snow winters they’ll strip them ². A sharp browse line in a cedar swamp or a stand of hemlock, with everything bare below about 6 feet, means too many deer for too long.

Under the snow

Snow is an insulating blanket. Once it’s deep, the space between its bottom and the frozen ground, the subnivean zone, stays near 32 °F however cold the air gets, because heat from the earth is trapped beneath it ³. Mice and voles live there all winter, running tunnels between their nests and food caches. You see their runways only when the snow melts ³.

Predators know it. A fox or coyote stands still, listens for a vole moving under the snow, then leaps and dives in nose-first ³. A trail that stops at a small crater with a body print in it is a fox’s hunting record.

Above the snow, others get by in their own ways ³:

• Chickadees live on seeds they cached in fall, fluff their feathers, and on very cold nights let their body temperature drop into torpor.
• Cottontails stay active, sheltering in thick brush and eating buds and twigs.
• Woodchucks are true hibernators: heart, breathing, and temperature all turned down in a burrow below the frost, living on fat until spring.

Tracking for science

Wisconsin counts its wolves largely by reading snow. Every winter, DNR, federal, and tribal biologists and trained volunteer trackers survey assigned blocks after fresh snow, recording wolf and other carnivore tracks. In winter 2025–26 they covered 17,771 miles of track surveys, the central input to the model behind the estimate of 1,162 wolves in 321 packs ⁴. Volunteers take a series of courses to be certified and then run at least three surveys a winter on their blocks.

Try it

The morning after the next fresh snow, walk a field edge or a creek. For each trail, decide the pattern first: line, pairs, clusters, or fours. Then follow one trail as far as you can and write down what the animal did: where it stopped, ate, dug, or met something else. Check the low twigs of any saplings along the way for ragged or clean-cut ends.