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The evening bat, Nycticeius humeralis, is an abundant bat throughout the southeastern United States, northward to the upper Midwest and Ontario. It ranges along the Atlantic seaboard south throughout Florida to Veracruz, Mexico. A true forest bat, the evening bat is almost never encountered in caves. It forms nursery colonies in hollow trees, behind loose…

Mexican free-tailed bats, Tadarida brasiliensis, occupy a wide variety of habitats, ranging from desert communities through pinion-juniper woodland and pine-oak forests at elevations from sea level to 9,000 feet or more. The largest U.S. populations of free-tailed bats live in the West, with the densest concentrations found in Texas where they form maternity colonies numbering…

Historically, the little brown myotis, Myotis lucifugus, was abundant throughout forested areas of the U.S. as far north as Alaska. It ranges from Alaska to Labrador and Newfoundland (Canada), south to southern California, northern Arizona, and northern New Mexico. In the West it is found mainly in mountainous and riparian areas in a wide variety…

The big brown bat, Eptesicus fuscus, is found in virtually every American habitat ranging from timberline meadows to lowland deserts, though it is most abundant in deciduous forest areas. It is often abundant in suburban areas of mixed agricultural use. This species ranges from extreme northern Canada, throughout the United States and south to the…