Animal echolocation in the external ear. There are two hypotheses about the evolution of echolocation in bats. The first suggests that laryngeal echolocation evolved twice in Chiroptera, once in the Yangochiroptera and once in the horseshoe bats (Rhinolophidae). The second proposes that laryngeal echolocation had a single origin in Chiroptera, was subsequently lost in the family Pteropodidae (all megabats), and later evolved as a system of tongue-clicking in the genus "Rousettus". Individual bat species echolocate within specific frequency ranges that suit their environment and prey types. This has sometimes been used by researchers to identify bats flying in an area simply by
Dwarf dog-faced bat is insectivorous and forages in groups. They generally eat small beetles, termites, winged ants, and moths. Some have been appeared to consume pollen, as well, which is common in insectivorous bats, but this is not confirmed, as the pollen could have been picked up while foraging for insects in flowers. This species is nocturnal, and uses echolocation to hunt for prey. They have been observed to roost near food sources to minimize foraging costs. This species of bat utilizes a polygynous mating system, with males mating with many females in a single breeding season. The breeding season varies region to