Egyptian fruit bat their days roosting in trees or caves, often with large groups of other bats, sometimes numbering in the thousands. They emerge from the roost to forage for food in the late evening, and return just before dawn. They hang upside down, with their wings folded closely around their bodies. Egyptian fruit bats, along with other species in the genus "Rousettus", are the only megachiropterid bats to use echolocation, which they accomplish by emitting a series of sharp clicks with their tongues. The clicks are normally slow and constant, but these clicks speed up dramatically when the bats approach an object.
Lesser long-eared bat sight is mostly restricted to aerial prey while they a technique that the species uses to take advantage of seasonal booms of tettigoniid crickets as well as general ground and aerial prey, known as passive listing. This method of hunting does not rely on sight or echolocation. Some moths species, like noctuids, have evolved to develop their own form of "ears" that are able to pick up the frequency of bat calls, however they are unable to sense long-eared bats as the bats use a minute whispering technique different from echolocation which bounces off the moths and is picked up