Physical Description
Delacour's langur is somewhat larger than its two closest relatives, Francois' langur and the Laotian langur, but in other respects has a similar appearance. Adults measure from 57 to 62 centimetres (22 to 24 in) in head-body length, with a tail 82 to 88 millimetres (3.2 to 3.5 in) long. Males weigh between 7.5 and 10.5 kilograms (17 and 23 lb), while the females are slightly smaller, weighing between 6.2 to 9.2 kilograms (14 to 20 lb). Their fur is predominantly black, with white markings on the face and distinctive creamy-white fur over the rump and the outer thighs, while females also have a patch of pale fur in the pubic area. Like other closely related lutungs, Delacour's langur has a crest of long, upright, hair over the forehead and crown; this is, however, somewhat taller and narrower than in other species.
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