Delacour's langur

Delacour's langur, also called Delacour's lutung, Trachypithecus delacouri, is a critically endangered Old World monkey endemic to northern Vietnam, named for the French-American ornithologist Jean Théodore Delacour. It is somewhat larger than its closest relatives, François' langur and the Laotian langur: adults are 57 to 62 cm long with a tail of 82 to 88 cm, males weigh 7.5 to 10.5 kg and females 6.2 to 9.2 kg. The fur is mostly black with white face markings and creamy-white fur over the rump and outer thighs, and there is a tall, narrow crest over the forehead. It is found only in about 6,000 square kilometres around Hanoi and the provinces of Ninh Bình, Hà Nam, Hòa Bình and Thanh Hóa, and the largest population lives in Van Long Nature Reserve on limestone karst. It is diurnal and folivorous. Hunting for traditional medicine is the main threat, and fewer than 250 animals remained in the wild as of 2010.