Oregon’s open databases hold just 20 fringed myotis records, one of the thinnest showings of any bat in the state’s overlay data. Nearly all of them come from the high desert country of southeastern Oregon, at Malheur National Wildlife Refuge, Steens Mountain, and John Day Fossil Beds National Monument.
Desert cliffs instead of coastal forest
Fringed myotis favors dry country with structure: sagebrush grassland, canyon rims, cliffs, and rock crevices rather than dense wet forest. Steens Mountain’s fault-block escarpment and the canyon walls of John Day Fossil Beds supply exactly that kind of broken rock, and Malheur’s high desert basin fits the same dry, open pattern. It’s a close match between the species’ known habitat and the one corner of Oregon where its records actually turn up.
Snags can stand in for rock
Away from the desert’s rock faces, the species also roosts in tree snags in parts of the Pacific Northwest, with females favoring loose bark and cavities in dry forest. In Oregon that likely means ponderosa pine edges near these desert basins can supplement cliffs and canyon walls as summer roost sites, even though no records here specifically document a snag roost.
Reports cluster in August, but with only 20 records total, that pattern says more about when bat surveys reached this corner of the state than about the species’ true seasonal activity here. NatureServe ranks the fringed myotis S2, Imperiled, in Oregon, against a G4 status globally, and it’s treated as native to its Oregon range.
Full species profile
