Bats navigate by making use of sounds that they emit. The way these sounds bounce off from nearby objects and obstacles and return to the bats’ ears enables it to gauge distances and avoid obstacles. Being in the range of 100,000 Hertz, these sounds are inaudible to human ears which can hear only upto 20,000 Hertz. Bats can discriminate between faint echoes of their own sound in the presence of other sounds.
Interestingly, large bats such as the flying fox do not use sound for navigating but rely on vision instead. They fly and feed by day and become disoriented if forced to fly in the dark.
