A few species have up to four young at a time. A newborn bat weighs about a fifth as much as an adult bat. Bats do not build nests, and so the infant must hold on to its mother or its home roost. Among some species, the infant clings to the mother for several weeks. The infants of other species stay in their roost, where they hang from a rock alone or with a group.
Female bats nurse their young for six to eight weeks.
Some kinds of bats Flying foxes and vampire bats are well known because of their unusual diet. Flying foxes eat mostly fruit, and vampire bats feed on the blood of other animals. Both live in tropical regions, where their feeding habits may damage the local economy. Flying foxes and similar species known as fruit bats live in most tropical regions of Africa and Asia. These bats eat mostly fruit and occasionally damage orchards.