What is Proboscis monkey?
{{Taxobox | name = Proboscis monkey | status = EN | status_system = IUCN3.1 | image = Proboscis.jpg | image_width = 225px | regnum = [[Animalia]] | phylum = [[Chordata]] | classis = [[Mammalia]] | ordo = [[Primates]] | familia = [[Cercopithecidae]] | subfamilia = [[Colobinae]] | genus = '''''Nasalis''''' | genus_authority = [[Étienne Geoffroy Saint-Hilaire|É. Geoffroy]], 1812}} The '''proboscis monkey''' (''Nasalis larvatus'') is found only on the island of [[Borneo]] in Southeast [[Asia]]. They live in [[mangrove]] forests, and also lowland [[rainforest]]s. It depends on the mangroves near river edges for resting and sleeping. They avoid deforested areas and avoid human settlements. The proboscis monkey eats mainly fruit and leaves.<ref name=Boonratana1993>Boonratana R. 1993. ''The ecology and behaviour of the proboscis monkey (Nasalis larvatus) in the lower Kinabatangan, Sabah''. PhD dissertation, Mahidol University.</ref> It also eats flowers, seeds and insects to a lesser extent. At least 55 different plant species are eaten.<ref name=Yeager/> Young leaves are preferred over mature leaves and unripe fruits are preferred over ripe fruit.<ref name=Boonratana1993/> Being a seasonal eater, the proboscis monkey eats mostly fruit from January to May and mostly leaves from June to December.<ref name=Yeager>{{cite journal|author=Yeager CP (1989) Feeding ecology of the proboscis monkey (''Nasalis larvatus'')|journal= Int J Primatol| issue=6|pages=497–530|title=Feeding ecology of the proboscis monkey (Nasalis larvatus)|year= 1989|volume=10|doi= 10.1007/BF02739363|s2cid= 23442969}} [https://link.springer.com/article/10.1007%2FBF02739363]</ref> Groups usually sleep in adjacent trees.<ref>{{cite journal|author=Yeager CP|year=1992| title=Proboscis monkey (''Nasalis larvatus'') social organization: group structure| journal=Am J Primatol| volume= 20| issue=2|pages=95–106|doi=10.1002/ajp.1350200204|pmid=31963992|s2cid=85675872}} [http://onlinelibrary.wiley.com/doi/10.1002/ajp.1350200204/abstract;jsessionid=47F5F9C3316BA2