Echolocation is a biological sonar used by some animal species like bats, whales, and dolphins to locate objects. These animals emit calls that bounce off objects and return echoes, which they use to identify the location and shape of surrounding objects. Echolocation allows animals to navigate, forage, and hunt even in dark environments by interpreting the echoes of emitted sounds. Scientists also study echolocation to understand how animals use sound waves to perceive their surroundings.