Oregon’s yuma myotis record is lopsided in an instructive way: 281 of 442 reports come from Klamath County alone. The Klamath Basin’s marshes and lake country suit this bat perfectly, since it forages low over open water, but a concentration that extreme also signals a long-running survey effort. Harney, Tillamook, and Clackamas counties trail far behind, and the record touches nineteen counties overall, from the coast to the high desert.
Reports build from April to a June crest and fade by October, matching the bat’s active season over western waters. One honest caveat: the most recent record in the current set dates to 2018, so the picture here runs a few years stale.
NatureServe ranks the species S3, vulnerable, in Oregon, though globally it’s considered secure. A bat this tied to water faces a state where wetlands have been drained and rivers dammed and diverted, and the spread of records, coast, valley, and basin alike, shows it still finds places to hunt.
Full species profile
