Bats rely heavily on sound and echolocation for survival. They use echolocation to hunt insects, navigate in the dark, and find friends and colonies. Their large ears and ability to emit and detect high frequency sounds allows bats to use echoes to locate prey and obstacles. Without echolocation, bats would be unable to feed themselves or navigate at night, and would not be able to locate social groups. Sound plays a far greater role for bats than it does for humans.