Animals that use echolocation make a sound, and then use its echo to locate objects like walls and ceilings. Bats use echolocation to keep from flying into buildings and trees, emitting a high-frequency sound that humans cannot hear. Bats also use echolocation to detect their favorite meal-bugs-and to avoid predators.
Not usually, although some owls seem to screech to reveal other animals. Bats (flying mammals) are the ones that send out sound waves using their mouth or nose. When the sound hits an object, an echo comes back. The bats can identify an object and its distance by the echo. They can even tell the size and shape from its echo. Most bats use echolocation to navigate in the dark and find food.