Echoes of Hunting

Bats use high-pitched sounds to zero in on prey, converting what they hear into how they fly.

By Sarah Webb, 00:00 AM April 17, 2006

If you go by what you see in cartoons or vampire movies, you might think that bats are big, scary, blood-sucking creatures that come out only at night.

Certainly, many bats are active at night and asleep during the day. They have sharp teeth. A few species do feed on blood. These vampire bats, which are actually quite small and rare, typically target birds, cattle, pigs, and other animals. When most bats are hungry, however, they stick to insects or fruit.

A big brown bat shows its sharp teeth.

A big brown bat shows its sharp ...

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