Northern flying squirrels glide between trees on a furred membrane stretched from wrist to ankle, gliding rather than truly flying, and Pennsylvania holds one of the species’ isolated southern populations in its higher-elevation forests. All 13 Pennsylvania records since 2000 come from iNaturalist, spread over 11 counties with no more than two in any one, a thin trail for a nocturnal glider that’s genuinely difficult to photograph.
The months are just as scattered, with no month logging more than two records, too few to show any seasonal pattern. NatureServe ranks the species S1, critically imperiled, in Pennsylvania, a much sharper concern than its secure global rank, underscoring how thin this relict population runs at the southern edge of its range.
Full species profile
