The silvery gibbon (Hylobates moloch) is a primate in the Hylobatidae or gibbon family. Its coat is bluish-grey in colour, with a dark grey or black cap. Like all gibbons, Silvery Gibbons lack external tails, have dorsally-placed scapula and reduced flexibility in the lumbar region. They have long, curved fingers and very long forelimbs relative to their hind limbs. On average, they reach 8 kg in weight.