Track Similar to those of the Red Squirrel, but slightly smaller; in snow, it is nearly impossible to distinguish tracks of the two species. Hindprints are about 1 1/2" (37 mm) long, with 5 toes showing; foreprints are about 3/4" (20 mm) long, with 4 toes showing. Trail often blurred by fold of skin between front and hind legs. Animal landing on snow leaves distinctive print showing all 4 feet and folds of skin.
Sign Look for evidence of nests in standing dead trees, especially stumps 6–20' (2–6 m) high with woodpecker holes near top. Look for piles of cone remnants and nutshells with one or two smooth edged openings, (Red Squirrels make a ragged opening, and fox and gray squirrels crush the nut).