Bats of the genus Pteropus, belonging to the megabat suborder,
Megachiroptera, are the largest bats in the world. They are commonly known as
the fruit bats or flying foxes among other colloquial names. They live in the
tropics and subtropics of Asia (including the Indian subcontinent), Australia,
East Africa, and a number of remote oceanic islands in both the Indian and
Pacific Oceans. At least 60 extant species are in this genus. The oldest
ancestors of the genus Pteropus to be unearthed appear in the fossil record
almost exactly as they are today the only notable differences being early
flight adaptations such as a tail for stabilizing.
The oldest megachiropteran
is dated about 35 million years ago, but the preceding gap in the fossil record
makes their true lineage unknown.Characteristically, all species of flying
foxes only feed on nectar, blossoms, pollen, and fruit, which explains their
limited tropical distribution. They do not possess echolocation, a feature
which helps the other suborder of bats, the microbats, locate and catch prey
such as insects in midair. Instead, smell and eyesight are very well-developed
in flying foxes. Feeding ranges can reach up to 40 miles.
When it locates food,
the flying fox "crashes" into foliage and grabs for it. It may also
attempt to catch hold of a branch with its hind feet, then swing upside down;
once attached and hanging, the fox draws food to its mouth with one of its hind
feet or with the clawed thumbs at the top of its wingsMany species are
threatened today with extinction, and in particular in the Pacific, a number of
species have died out as a result of overharvesting for human consumption. In
the Marianas, flying fox meat is considered a delicacy, which led to a large
commercial trade. Human consumption of flying fox meat in Guam is hypothesized
to have led to an increase of human neurodegenerative illness. In 1989, all species of Pteropus were placed
on Appendix II of CITES and at least seven on Appendix I, which restricts
international trade.
The subspecies P. hypomelanus maris of the Maldives is
considered endangered due to limited distribution and excessive culling. The
commerce in fruit bats continues either illegally or because of inadequate
restrictions. Local farmers may also attack the bats because they feed in their
plantations, and in some cultures, their meat is believed to cure asthma.
Nonhuman predators include birds of prey, snakes, and other mammals. The pelage
is long and silky with a dense underfur. No tail is present. As the name
suggests, the head resembles that of a small fox because of the small ears and
large eyes. Females have one pair of mammae located in the chest region. Ears
are simple long and pointed with the outer margin forming an unbroken ring a
defining characteristic of megabats. The
toes have sharp, curved claws.
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