The Big Brown Bat (Eptesicus fuscus) is a medium-sized bat commonly found in North America. It has a wingspan of about 12 to 13 inches and weighs between 0.5 to 1 ounce. This bat is known for its brown fur and large ears, which help it navigate and hunt for insects using echolocation. Big Brown Bats are primarily nocturnal and are often seen foraging for food at dusk. They feed on a variety of insects, including beetles and moths. These bats typically roost in buildings, trees, or under bridges, making them adaptable to urban environments.