ornithologist Jean Théodore Delacour. Delacour's langur is somewhat larger than its two closest relatives, François' langur and the Laotian langur, but in other respects...

altitudes, but the Nepal gray langur and Kashmir gray langur occur up to 4,000 m (13,000 ft) in the Himalayas. These langurs are largely gray (some more...

Gee's golden langur (Trachypithecus geei), also known as simply the golden langur, is an Old World monkey found in a small region of Western Assam, India...

The Raffles' banded langur (Presbytis femoralis), also known as the banded leaf monkey or banded surili, is a species of primate in the family Cercopithecidae...

black-and-white colobus, the large-nosed proboscis monkey, and the gray langurs. Some classifications split the colobine monkeys into two tribes, while...

northern plains gray langur (Semnopithecus entellus), also known as the sacred langur, Bengal sacred langur and Hanuman langur, is a species of primate...

The pig-tailed langur (Simias concolor), monotypic in genus Simias, is a large Old World monkey, endemic to several small islands off the coast of Sumatra...

the IUCN Red List of Threatened Species classified the red-shanked douc langur as endangered. In 2020, the IUCN updated their classification of the species...

The Nepal gray langur (Semnopithecus schistaceus) is a gray langur endemic to the Himalayas in Nepal, far southwestern Tibet, northern India, northern...

one of the most endangered primates in the world. Only about 300 Delacour's langurs are alive today, and experts fear they could be completely extinct...