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Bats Northwest

"helping bats in Washington State"

Big Brown Bat

(Eptesicus fuscus)

myotis lucifugus

These bats are closely associated with humans, as their summer roosts are often located in attics, barns, bridges, and other man-made structures, where colonies of a few to several hundred individuals gather to form maternity colonies. They hibernate during the coldest weather, though no one knows where most go.

More on the Big Brown Bat.

Photo © Brock Fenton. Used with Permission