Kloss’s gibbon  (Hylobates klossii)

Description

Both male and female Kloss’s gibbons have short, black hair throughout their lives. The chest is broad and the limbs are long (4), which aids in swinging from branch-to-branch, a form of locomotion known as ‘brachiation’ (5). The thumbs and big toes are also very long, and there is webbing between the digits of the hands and feet (4). There is a sac below the throat which is used to produce calls (5). The muzzle is relatively short, and the hair on the crown lies flat; in infants, however, this hair is erect (4).

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