Pygathrix

Pygathrix is the genus of the doucs or douc langurs, colobine Old World monkeys native to Southeast Asia. Three species are recognised: the red-shanked douc, the black-shanked douc and the gray-shanked douc. Despite the common name douc langur, the doucs are more closely related to the proboscis monkey and the snub-nosed monkeys than to any of the true langurs, and they belong to the subfamily Colobinae of the family Cercopithecidae. Doucs have a distinctive appearance: the red-shanked douc has bright maroon legs and reddish patches around the eyes, the grey-shanked douc is duller with speckled grey legs and orange markings on the face, and the black-shanked douc has black legs. All three have dappled grey bodies, black hands and feet and white cheeks, and their long hind limbs and tails make them agile in the treetops. They live in small family groups headed by one adult male, with several adult females and their young, and young males without a family group often form troops of their own. Females usually bear a single offspring at a time, which is suckled for about a year.