Microbats are the group of bats known for their use of echolocation. Their nocturnal habitats coupled with poor night-time vision make echolocation their main sensory tool for navigating and hunting. Echo-locating bats emit high-frequency sounds from their voice box (larynx) and listen to the returning echoes. They can detect an object as small as 1 millimeter (0.5 inches). However, echolocation for hunting has a downside. Most of the sounds emitted by bats are too high-frequency for humans to hear. But other animals, such as some moths, crickets, and beetles, have developed bat-detecting ears. Whether on their legs, head, or abdomen, bat-detecting ears allow the prey to hear the bat coming from as far away as 40 meters (130 feet). Given that echo-locating bats cannot detect moths until they are within about 5 meters (16.5 feet), the prey may be able to escape before the bat finds it.