But their colony size can be in the 1,000's. Most bats fly at night. Many eat half their weight in insects in one night. A little brown bat can eat 600 insects in an hour. A colony can eat 6,000 tons of insects in one year.
Tropical bats can transfer pollen as they fly from plant to plant.
They digest bananas, mangoes, guavas, and berries in 20 minutes. The seeds of the fruit are dropped by the bats as they are flying. This reseeds large areas of land. There are people who think that bats are dirty and evil. Bats are very clean and groom their wings and teeth daily.