Silvered Langur

• Common Names: Silvered Langur, Silvery Lutung
• Taxonomy Classification Year: 1821
• Monkey Size: 46.5 to 56.0 cm (18.31 to 22.05 in)
• Skin Color(s): Dark gray
• Habitat: Forest, rainforest, scrub forest
• Diet: Herbivorous
• Native Countries: Malaysia, Sumatra, Borneo

The silvery Lutung^[1] (Trachypithecus cristatus), also called the silvery langur or silvered leaf monkey is an Old-World monkey.

• It is arboreal and lives in coastal, mangrove, and riverine forests of the Malay Peninsula, Borneo, and Sumatra.
• It is the species of its species group. The coat color of Silvery lutung monkeys is dark gray. The ends of the hair are a lighter gray, giving it an overall silver effect. The ventral part of the tail and the crest are yellowish.
• Their faces are black, and their heads’ black hair swings to a peak. There are slight variations in hair color, including brown, brownish-gray, or black.
• Although adult males are slightly larger than adult females, it can be difficult to tell the sexes apart visually.
• A noticeable distinguishing feature is the white spots on the inner flanks of females. In addition, as is typical of Colobin monkeys, the lower jaw sticks out more than the upper jaw.
• The genus Trachypithecus is distinguished from other colobines by its prominent nasal bones, well-developed sagittal crest, and deep superciliary ridges.
• The size of their thumbs is reduced, allowing them to perform brute force movements more when moving through their forest habitats.
• Its front and hind legs are almost the same lengths, which is unique for an Old-World monkey. This suggests that they may have previously occupied a more terrestrial habitat.

• Silvery Lutungs primarily live in trees. They are diurnal, meaning most of their daytime activity occurs until sunset.
• These monkeys make at least 13 different calls.
• Silvery lutungs are a peaceful species and have low aggression towards each other within their social group.
• They have a uni-male social structure. This means that groups consist of single adult males, several adult females, infants, and juveniles.
• Silvery lutungs are prone to human diseases, including AIDS, so they have been widely used in medical research.