Brown bat may refer to:
Species
Little brown bat, Myotis lucifugus, one of the most common bats of North America Big brown bat, Eptesicus fuscus, native to North America, Central America, the Caribbean, and extreme northern South America Argentine brown bat, (Eptesicus furinalis), a bat species from South and Central America. Brown tent-making bat, (Uroderma magnirostrum), a bat species from South and Central America.
Genus
Eptesicus — genus containing many species commonly called serotines or brown bats.