Wyoming sits at the edge of the California myotis’s range, in the arid country of rock, rim, and dry wash that this little bat favors across the interior West. The state’s file holds no records from 2000 to 2026. Older records came mainly from Sweetwater County, the sagebrush-and-badlands country along the Green River, with a few from the Bighorn Basin counties to the northeast.
NatureServe treats the state rank as not applicable here, a sign the species sits at the very edge of its mapped range in Wyoming. With no current records, the state file can’t say whether these bats are a thin resident population or wanderers from stronger populations farther south. Late summer into fall, when bats gather at roost sites and surveyors work the warm nights, is when a new record would most likely turn up, and the Green River badlands are where it would surface first.
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