Every one of Pennsylvania’s confirmed northern myotis records comes from GBIF specimen and survey data, not a single iNaturalist photograph, which tracks with how this bat is actually found: biologists locate it in cave and mine hibernacula and forest mist-net surveys rather than by chance sighting. NatureServe lists it S1, Critically Imperiled, in Pennsylvania, a steeper decline than its global Vulnerable rank reflects, the toll of white-nose syndrome on cave-wintering bats.
The handful of records spread thinly from March through November with no single strong peak, too few sightings to read a real seasonal pattern into. Reports cluster around Allegheny National Forest, Delaware Water Gap, and Ricketts Glen State Park, forested tracts with the kind of mixed woodland and rock features this bat hunts and hibernates in.
Full species profile
