The endemic Purple- faced leaf langur in Sri Lanka is represented by four sub species. Of the four sub species, the western purple faced leaf langur [Trachypithecus vetulus nestor- Bennet, 1835) has grayish black pelage ...

Sri Lanka is home to five species of primates, the toque macaque (Macaca sinica), purple face langur (Semnopithecus vetulus), grey langur (Semnopithecus priairi) and two species of slow loris (Loris tardigradus, L. ...