Little brown myotis roost in caves, mines, and building crevices and forage after dark over slow water rich in insects. Idaho’s 14 records since 2000, 13 of them iNaturalist observations, are scattered across 9 counties, with Kootenai’s 3 the most of any and one from the Coeur d’Alene National Forest.
Records run from June through October, with July’s 5 the most of any month, too few to say much about when the bats are most active. NatureServe ranks the species S3, Vulnerable, in Idaho, a step up in concern from what its rare statewide record count alone would suggest.
Nationally this bat crashed from one of the most frequently recorded species in North America to globally Endangered after a cold-loving fungus called white-nose syndrome reached hibernating colonies starting in 2006. That fungus has been slower to reach western states like Idaho than the East.
Full species profile
