Echo location, also called biosonar, is the biological sonar used by several kinds of animals. Echo-locating animals emit calls out to the environment and listen to the echoes of those calls that return from various objects near them. They use these echoes to locate and identify the objects. Echo-locating animals include some mammals and a few birds; most notably microchiropteran bats and odontocetes (toothed whales and dolphins).
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