Open databases return 152 Arizona records of the silver-haired bat, though only 33 are iNaturalist photographs; the rest are specimen and detector records, a split that reflects how hard this dark, fast night-flier is to catch on camera.
A bark-roosting migrant
The silver-haired bat is a solitary tree bat that tucks under loose bark and into cavities rather than gathering in cave colonies. In Arizona it favors wooded canyons and higher forested ground, and the county totals track that preference, led by Cochise County and its ranges and backed by the pine country of Coconino. It is a bat of forest edges and water, hawking insects low over streams and clearings after dark.
Two pulses, not one
Read across the year, the records rise in spring and again in early autumn, and that twin pattern is the fingerprint of migration rather than a single active season. The silver-haired bat is a seasonal traveler, and Arizona sits along its route, so detections concentrate as animals pass through in each direction and thin during the depths of winter when the population has moved on or dropped into torpor.
A watched species
NatureServe ranks the silver-haired bat as vulnerable in Arizona. Like other migratory tree bats it flies long distances between seasons and is sensitive to the loss of the mature forest it roosts in, so even a species that turns up statewide on a detector survey carries a conservation flag worth keeping in view.
Full species profile
