Javan langur  (Trachypithecus auratus)

The name ‘langur' means ‘long tail' in Hindi (4), and this species' tail is indeed noticeably long, measuring up to 87 cm in length while the body is only around 55 cm long (2) (3). There are two subspecies of the Javan langur: the eastern Javan or spangled ebony langur (Trachypithecus auratus auratus) has two distinct colourations: the more common one being glossy black in colour with a slight brownish tinge on the sides of the body, ‘sideburns', and legs (5). The skin of the face, palms and soles is also black. The rarer form of this subspecies is a deep orange colour with yellow tinges on the side of the body, limbs and hair around the ears, and black tinges on the back (5). The second subspecies, the western Javan or West Javan ebony langur (Trachypithecus auratus mauritius) is glossy black with a very slight brownish tinge on the sides of the body, sideburns and legs (5). Female Javan langurs can be distinguished from males by the pale, yellowish white patch around the pubic area. Juveniles are even more distinctive as they are orange in colour (6).