Montana’s red-tailed chipmunk records trace the wet northwest corner of the state and little beyond it. Glacier National Park alone accounts for 29 of 86 reports. Flathead, Glacier, and Ravalli counties carry most of the remainder, with a light scatter south through the Bitterroot country to Granite County. East of the Continental Divide the record thins to nearly nothing. That matches the species’ loyalty to moist western larch and cedar-hemlock forest.
July and August dominate the calendar. Those are the months when chipmunks are most active above ground and the park’s trails are full of people to notice them. Treat the summer crest as biology and visitation stacked together. NatureServe considers the species apparently secure in Montana. The pattern here is reassuringly ordinary: a forest chipmunk well documented where its habitat and its observers coincide, and thinly recorded everywhere else.
Full species profile
