Delacour’s Langur

• Common Name: Delacour’s Langur
• Taxonomy Classification Year: 1932
• Monkey Size: 57 to 62 cm (22 to 24 in)
• Skin Color(s): Black
• Habitat: Rainforest
• Diet: Herbivorous
• Native Countries: Vietnam

The Delacour’s langur^[1], also known as Delacour’s Lutung, is an endangered Lutung native to northern Vietnam.

• Delacour’s langurs are known for the distinct patches of white fur on their thighs that contrast with their black fur.
• Females also have a patch of white fur close to their genitalia. Like its relatives ​​in the Langur and Lutung families, the Delacour’s langur has tufts of gray hair on its cheeks and a tuft on its head.
• Like many of its relatives, baby Delacour’s langur has bright orange fur for the first 4 months of life.
• This odd feature has been the subject of several scientific theories and studies.
• You might think bright colors would make the baby more visible to predators, but the color seems to help babies.

• The species is named after Jean Théodore Delacour, a French-American ornithologist.
• Delacour’s langurs prefer rocky habitats and live in “karst forests, ” basically tropical forests with limestone caves and cliffs.
• They are among the few mammals referred to as trogloxenes – animals that spend most of their lives in burrows.
• Any adult in the group can look around, quickly spot the infants and move to protect them when danger is detected.
• The color patterns of the Delacour langur give the monkey its local name, “Vooc quan đùi trang“, which is Vietnamese for “white pants langur“.