If you ever think you work hard for the food you eat, try tracking a fisher! I would estimate that I followed a fisher’s tracks for at least three miles today and other than stopping to mark its territory once, and investigate a log or two, there was not a sign of its finding a thing to eat. Fishers travel widely in search of prey — one was recorded travelling 56 miles in three days. The fisher I followed traveled through prime snowshoe hare (their most common prey item) habitat, as well as areas where porcupines have been known to den. A fisher’s food requirements are about one snowshoe hare per week, a squirrel or two per week, or 2 – 22 mice per day. A porcupine will feed a fisher for a month or so. (Note snowshoe hare tracks on bottom left of photograph, and fisher tracks running diagonally across the image, where the fisher left its mark.)
This is the common bounding pattern of a red squirrel in snow. When it bounds, or hops, its smaller front feet land first, and then the larger hind feet pass to the outside and around the front feet to land in front of them. In this photograph the squirrel is headed towards the top of the photograph . There are many exceptions to the rule, but often bounding animals that are tree climbers, such as squirrels, often place their front feet more or less side by side, whereas animals such as rabbits and hares, which do not climb trees, often place their front feet diagonally, one in front of the other.
It may be possible to tell the difference between white-footed and deer mouse tracks, but I certainly can’t. The only clue that sometimes works is to note the habitat in which you see the tracks– they are somewhat more likely to be those of a deer mouse if they are in a coniferous forest, but not always! White-footed and deer mice often travel on top of the snow. They are bounders, leaving tracks that resemble those of a miniature rabbit, with the larger back feet landing in front of the smaller front feet. There is often a tail mark, but not always, as they can and do hold their tails vertically at times.