Indochinese Grey Langur

• Common Name: Indochinese Gray Langur
• Taxonomy Classification Year: 1909
• Monkey Size: 106 to 130.15 cm (42.12 to 51.24 in)
• Skin Color(s): Light blue-grey
• Habitat: Forest, rainforest
• Diet: Herbivorous
• Native Countries: Thailand, Vietnam, Myanmar

The Indochinese gray langur^[1] (Trachypithecus crepusculus) is a species of Lutung native to Southeast and East Asia.

• The Indochinese gray langur’s body and tail are light bluish-gray, with ventral fur ranging from silver-gray to white.
• The facial skin is dark gray with lighter pigmentation in a ring around the eyes and patches of unpigmented skin in the middle of the lower and upper lips.
• They have a thick crest on their heads and a long tail of about 83 centimeters.
• Males and females of this species are similar in size, weighing between 6.4 and 7.1 kilograms and having a head-to-body length of around 51 centimeters.
• Females have a distinctive “pudenda” of white fur and pale skin in front of the callosities.

• This species was once thought to be conspecific with the Phayre’s leaf monkey (Trachypithecus phayrei). Still, a 2009 study found it to be a separate species.
• Indochinese gray langur monkeys are pretty shy and often run away when threatened.
• Group size can be up to 20 individuals and may consist of more than one male with several females and their young.
• Unlike langurs that live in karst forests, which have a primarily terrestrial lifestyle, the Indochinese gray langur inhabits old-growth evergreen forests.
• The population of this species is believed to be only about 2, 400-2, 500 adult individuals. It is threatened by habitat destruction and hunting, particularly in Vietnam and Laos.