The Proboscis Monkey (Nasalis larvatus) or long-nosed monkey, known as the Bekantan in Indonesia, is an arboreal Old World monkey with an unusually large nose, a reddish-brown skin colour and a long tail. It is endemic to the southeast Asian island of Borneo and is found mostly in mangrove forests and on the coastal areas of the island.
This species co-exists with the Bornean orangutan. It belongs in the monotypic genus Nasalis.
