Bats are somewhat difficult to study because of their secretive, nocturnal habits and their flight capabilities. Although well over nine hundred species have been identified and catalogued, additional species have since been discovered, primarily from the South American rain forests. New ones remain to be discovered, and the classification of bats continues to be improved. Bats are the most widely distributed kind of terrestrial mammal. They are found from Alaska to the tip of Argentina and from near the Arctic Circle to South Africa. They occur widely through the tropical regions and in the temperate zones.
Physical Characteristics of Bats
Although bats range in size from tiny hog-nosed bats that weigh less than a penny to flying foxes whose wing spans exceed five feet, the majority of bats tend to be small. Despite variation in size, all species of bat share the same body form, with certain similarities in fur and skin, wings, teeth, reproductive system and patterns, and visual and hearing systems. The bat's skin is black or dark grayish brown in color, with tiny transparent hairs on the membrane surface. While most bats have small eyes, perhaps encouraging the misconception that bats are blind, their auditory system is developed to an extraordinary degree. Of the bats who feed on animals, some feed on insects and whole animals; vampire bats, which occur from Mexico to Argentina, feed only on the blood. Plant-eating bats feed on fruit and flowers. Female bats give birth at the roost site, frequently while hanging upside down. Bat young are born in a breech presentation and are helpless until they are large enough to fly. Brown bats reach adult size and begin to fly at three to four weeks of age.
Thanks for description - Animal life club