Allen’s big-eared bat is one of Arizona’s least-seen bats, a moth-hunting specialist that works the cluttered air of canyon walls and mountain forest after dark. Open occurrence databases hold 26 Arizona records for it, and only 17 of those are iNaturalist photos. The rest reach GBIF from outside iNaturalist, which fits an animal almost no casual observer ever notices.
Where it turns up in Arizona
With only 26 records the pattern is loose, but Cochise and Maricopa counties hold most of them, with a few more from Coconino County. This bat needs both a cool sheltered roost by day and structurally complex forest to hunt at night, so it keeps to places where cliff crevices, mine adits, and moth-rich woodland sit close together. Open valley floors without nearby rock shelter rarely hold it.
A survey animal, not a sighting
The thin record is honest biology, not absence. As a night-active gleaner that picks insects off leaves and bark in tight quarters, the species leaves little for daytime hikers to find, and it is caught mainly through mist-netting and acoustic surveys built around its distinctive echolocation. Warm-season detections dominate because the bat is active and breeding then, while the cold months fall quiet as it retreats to sheltered roosts.
NatureServe ranks Allen’s big-eared bat S2, imperiled, in Arizona, reflecting its narrow footprint and dependence on undisturbed roosts. Females raise a single pup a year, so a sealed mine or a repeatedly disturbed cliff colony can dent a local population for years. The Chiricahuas and the wider sky-island country of Cochise County are the likeliest places to encounter it, though seeing one takes patience and a night in the right canyon.
Full species profile
