The largest bats in the world are the flying foxes of Australia and Southeast Asia. The smallest mammal in the world is a bat called the bumblebee bat. It weighs a . more than an orange b . about the same as a half dollar c . less than a penny 3. 20 million b . 2 billion c . 100,000 4. Many bats have unusual facial features, such as huge ears and strange nose flaps, that a . help them fly b .
Most bats feed on insects.
Female bats usually give birth hanging upside down. Vampire bats use their sharp teeth to make a tiny slit in their prey's skin. As blood oozes out, they lap it up. These bats usually feed on the blood of a . Many of these long-tongued bats are important plant pollinators in a .