Big Brown Bat

Eptesicus fuscus

Winters in buildings and bridges instead of caves. One of the most cold-tolerant bats in North America.

Population: No global numerical estimate; IUCN describes it as widespread with a presumed large population and an increasing population trend
Habitat: Highly adaptable; roosts in buildings, barns, churches, industrial structures, tree hollows, caves, and rock crevices; found in cities, towns, and rural areas, but avoids heavily forested regions
Fun fact: The big brown bat's genus name Eptesicus derives from Greek for "house flyer," reflecting its strong preference for roosting in human structures like attics and barns.
Range: Southern Canada through temperate North America, Central America, extreme northern South America, and the West Indies
Diet: Insectivorous; primarily beetles, supplemented by moths, flies, wasps, and dragonflies; consumes at least 1.4 grams of insects per hour
Size: 0.12 m
Wingspan: 0.33 m
Lifespan: 19 years

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