Mammals are very few; they include the rat and Pteropus and other bats.
There is great variation in size; the Malay "flying-fox" (Pteropus edulis) measures about a foot in the head and body, and has a wing-spread of 5 ft.; while in the smaller forms the head and body may be only about 2 in., and the wing-spread no more than a foot.
The Pteropus edulis (kalong, flying fox) is to be met with almost everywhere, especially in the durian trees.
When first seen by Europeans it contained no mammals except a large fruit-eating bat (Pteropus vulgaris), which is plentiful in the woods; but several mammals have been introduced, and are now numerous in the uncultivated region.
The large fruit bats (Pteropus) occur in immense colonies, and are sometimes eaten by the natives.