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Track Similar to Mink's and American Marten's but larger. Prints wider than long, with claws showing; 2" (50 mm) wide on dirt, to more than 2 5/8" (50–67 mm) on snow. Runs with forelimbs moving in sync, one slightly ahead of other. Forepaws leave ground just before hindpaws arrive, resulting in typical mustelid twin prints, or sets of 2 prints, 1 slightly ahead of the other. Tracks may end abruptly at base of tree.
Sign A dead porcupine, partially eaten and lying on its back, is a good sign that a Fisher has been nearby.
Scat: 4–6" (100–150 mm) long, dark, roughly cylindrical, often segmented; may show fur, bone, berries, or nuts. Scat with porcupine quills almost a sure sign of Fisher.
