Tufted gray langur

The tufted gray langur, Semnopithecus priam, also known as the Madras gray langur or Coromandel sacred langur, is an Old World monkey and mainly a leaf-eater found in southeast India and Sri Lanka. It is one of three Semnopithecus species named for characters of the Iliad, with Semnopithecus hector and Semnopithecus ajax. There are two subspecies, one in India and one in Sri Lanka. It is 55 to 80 cm long with a tail of 75 to 90 cm and weighs 11 to 20 kg, and it is the largest native primate of Sri Lanka by average size. It is mostly folivorous but eats fruits and seeds, and it ingests the gum of Sterculia urens to counter the strychnine in its diet. Troops of about 20 to 50 are philopatric, leopards and black eagles are the main predators, and the species is listed as Near Threatened, with hunting and habitat destruction contributing to the decline.