Bat prevent them from spending too much time in unfamiliar places, and decrease predation. In some species, pregnant individuals may not use torpor. The smallest bat is Kitti's hog-nosed bat ("Craseonycteris thonglongyai"), which is long with a wingspan and weighs . It is also arguably the smallest extant species of mammal, next to the Etruscan shrew. The largest bats are a few species of "Pteropus" megabats and the giant golden-crowned flying fox, ("Acerodon jubatus"), which can weigh with a wingspan of . Larger bats tend to use lower frequencies and smaller bats higher for echolocation; high-frequency echolocation is better at detecting
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