Illinois has only 10 records of the western little brown myotis since 2000, which puts it in the occasional bucket. They’re scattered from Winnebago and McHenry counties in the north to Union and Jackson counties in the south, where Shawnee National Forest holds one.
No month holds more than two records, too few to show any season. The more striking number is the conservation rank itself: NatureServe still lists the species S5, Secure, in Illinois, even though white-nose syndrome has pushed this same bat to globally Endangered by wiping out huge hibernating colonies farther east. Illinois hasn’t reported that kind of collapse, at least not yet in this record set.
Full species profile
