A bat can fly at night or even with its eyes closed. But if you cover its ears, it can't fly very well. Bats make sounds that people can't hear. The bats find their way by listening to these sounds as they echo off things. Bats even locate insects to eat by following the sounds that bounce off the bugs. People use their eyes, but bats use their ears to know where they're going. This paragraph mainly tells:
how bats use sound
what things bats often eat as food
how bats fly toward people
how people can hear the sounds of bats