Bat

The most interesting ability of bats is undoubtedly the echolocation. The principle is relatively simple. A bat emits from its mouth or nose a high-frequency sound, that can be compared to a short scream. Echolocation sound is pitched so high that it is beyond the human hearing range. At that moment the bat has its ears closed with a special flap. Sound travels through the air in the form of sound waves. They are bounced off solid surfaces they hit e.g. from flying moths. At that moment the bat has already opened the flap in its ears and listens to the reflected sound. The nature of the reflected sound enables the bat to extremely accurately determine the distance

and size of the prey as well as its relative speed and direction of movement. The bat is able to emit a signal many times per second.