Bats are the only mammals capable of flying. There are a great many of them, large and small, and there are nearly 950 different species. It is calculated that one mammal out of ten on the earth is a bat. Their scientific name, chioptera, means 'beings which fly with their hands'. In fact, their wings consist of a double layer and back limbs, and in some species by the tail. Bats live for about thirty years and eat up to tired thousand insects a night. Multiply the figure and in a bats lifetime, it could consume nearly 33 million insects. The bat is like a natural insecticide