Big brown bats make their homes in rural areas, towns, and cities, sometimes choosing barns, houses, or other buildings as roosts. Males usually live alone; females gather in maternity colonies in the spring and summer to give birth and raise their young. Learn more about the Eptesicus fuscus, more commonly known as a Big Brown Bat, in this easy-to-read species overview by the Smithsonian's National Museum of Natural History.