The red fox, kit fox, grey fox and arctic fox are all different species of foxes that inhabit parts of North America. You might encounter the tracks of these canines after a light snow or in the mud or sand close to a river or stream. You can identify the tracks of a fox by the specific features of the prints.
A fox track shows the impressions of four toes on each foot, as well as claws. All canines have four toes per foot and cannot retract their claws like most feline species can. At the base of each toe, when conditions are right, you will notice an imprint made by the claws.
Note the geographical ranges of the North American fox species when trying to identify a fox. The range of the arctic fox overlaps only the range of the red fox in northern parts of Canada. The range of the grey fox overlaps that of the red fox in the eastern United States and a small portion of the Southwest. The range of the kit fox overlaps that of the grey species in the Southwest and portions of the Great Plains. The kit fox lives in the same states as the red fox in portions of the Great Plains, Southwest and Rocky Mountains.
Search for the four oval toe imprints in front of a chevron-shaped heel pad when trying to identify fox tracks. In many cases, especially in winter when the fox has more hair to combat the effects of the cold, the toe imprints may be indistinct.
Look for size differences between fox tracks in areas where different species overlap. The red fox leaves a track between 1.75 inches and 2.5 inches long, according to the Alderleaf Wilderness College website. The grey fox has tracks a bit smaller, about 1.25 inches to 1.75 inches in length. The kit fox tracks are less than an inch and a half long, while the arctic species, although lighter than a red fox, has bigger feet, with the track as long as 3.5 inches.
Examine any tracks you find that seem to run in a straight line. You usually discover fox tracks left in this manner, with one in front of the other, according to the "National Audubon Society Field Guide to Mammals." The distance between the tracks varies among species, because the length of the legs varies. For example, the red fox has longer legs than the smaller kit and grey fox. Also note that often a fox steps with its hind foot right into the imprint left by the front foot.