Big Brown Bat
The big brown bat has a large weight range of 14-21 grams. Their wings can span 13-16 inches (32-40 cm). The pelage is completely brown, ears are short, and their membranes are hairless.
The big brown bat is very widespread. Individuals can be found as far north as southern Canada, throughout the United States, and into Central and South America.
Ecology and Behavior
Big brown bats are known to coexist in human environments. Colonies like to roost in man-made structures and occasionally this species can be found alongside roosts of the Brazilian free-tailed bat. Big brown bats hibernate in caves or mines either alone or with a small cluster of individuals.
Big brown bats are known to feed mainly on beetles but will feed on ants, mosquitoes, flies, and other insects when available.
Red dots indicate captures prior to 2009 and yellow dots indicate captures after 2009. The yellow line separates the Great Basin ecoregion on the left from the southern Rockies region on the right.
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