Moustached bats typically roost together in large colonies, in hollows such as caves, mines, or tunnels, and probably also in hollow trees. Roosting individuals may or may not be in physical contact with one another. Aerial-feeding species that
eat flying insects, moustached bats use echolocation to detect, track, and evaluate their targets. When echolocating, seven species of mormoopids separate pulse and echo in time. But Parnell's moustached bat separates pulse and echo in the frequency domain, making them more like the horseshoe (Rhi-nolophidae) and Old World leaf-nosed bats (Hipposideridae) of the Old World.
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