Trachypithecus obscurus

Description
Spectacled Langur, also known as Dusky Langur, Dusky Leaf Monkey or Spectacled Leaf Monkey, is one of the most common monkeys found in Khao Sok National Park. Spectacled Langurs are often seen on treetops on early mornings or late afternoons feasting on fresh leaves and fruit. Best place in Khao Sok to see them is Cheow Larn Lake, but if you are lucky and start your trek early, you can also see them along the treks leaving from the National Park main head quarters. They have very long tails and therefore are easy to distinct from other monkey species living in the same area. The name Langur comes from Hindu word for long-tailed. They are listed as ‘lower risk, near threatened’ on the IUCN Red List.

Diet
More than half of the diet consists of leaves. Rest of the diet consists of fruits, seeds and flowers. Spectacled Langurs use about 4 hours a day for feeding.

Habitat
From Northeastern India to Malay Peninsula. Spectacled Langurs can be found from upper or middle canopy of primary forest, normally in altitudes below 1000 meters and are very territorial. They normally live in groups of 10-35 monkeys. Their habitat can be as large as 33 hectares.

Reproduction
Gestation period is normally around 150 days. It is quite surprising that Spectacled Langur newborns are bright orange in color! When babies are about 9 months old they change their color to normal gray-black color.