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Mountain Beaver Aplodontia rufa

Track Narrow footprints, each less than 2" (50 mm) long; hindprints are larger than foreprints and may overlap them. Small first toe on forefoot may not print.

Sign Burrows up to 19" (480 mm) in diameter, with entrances surrounded by fan-shaped earth mounds and pathways, or sometimes by cylindrical earth cores, up to 6" (150 mm) in diameter, made during winter tunneling and left on surface after snow cover melts. In very wet areas, a "tent" of sticks covered with leaves and fern fronds is erected over burrow entrances. In late summer, "haystacks" of ferns and other vegetation are piled up to 2' (600 mm) high on logs or on the ground.