East Javan langur

The East Javan langur (Trachypithecus auratus), also known as the ebony lutung, Javan langur or Javan lutung, is an Old World monkey of the subfamily Colobinae. It is most commonly glossy black with a brownish tinge to its legs, sides and sideburns, and it lives on the island of Java and several surrounding Indonesian islands. The Latin name auratus means golden and refers to a less common colour variant, so the name golden langur belongs to a different species. The tail is long, up to 98 centimetres against a body of about 55. Juveniles are orange, and in the nominate subspecies a rare morph keeps the juvenile colouring into adulthood. It inhabits the interior and edges of rainforest, is diurnal and arboreal, and eats mainly leaves, fruit, flowers and flower buds, as well as insect larvae, using a specialised stomach and enlarged salivary glands to digest plant material. It lives in groups of around seven with one or two adult males, shows no clear mating season, and the western form has since been split off as Trachypithecus mauritius.