Editing Proboscis monkey (section)

==Description==
[[File:Proboscis monkey (Nasalis larvatus) male head.jpg|thumb|Male]]
[[File:Proboscis monkey (Nasalis larvatus) female Labuk Bay.jpg|thumb|Female]]
The proboscis monkey is a large species, being one of the largest monkey species native to [[Asia]]. Only the [[Tibetan macaque]] and a few of the [[gray langur]]s can rival its size.

[[Sexual dimorphism]] is pronounced in the species. Males have a head-body length of {{convert|66|to|76.2|cm|in|abbr=on}} and typically weigh {{convert|16|to|22.5|kg|lb|abbr=on}}, with a maximum known weight of {{convert|30|kg|lb|abbr=on}}. Females measure {{convert|53.3|to|62|cm|in|abbr=on}} in head-and-body length and weigh {{convert|7|to|12|kg|lb|abbr=on}}, with a maximum known mass of {{convert|15|kg|lb|abbr=on}}.<ref name=Napier1985>{{cite book|last1=Napier |first1=J. R. |last2=Napier |first2=P. H. |year=1985 |title='The Natural History of the Primates |location=Cambridge, Massachusetts, USA|publisher=MIT Press |isbn=0262640333}}{{Page needed|date=August 2023}}</ref><ref>{{cite web |url=http://pin.primate.wisc.edu/factsheets/entry/proboscis_monkey/taxon |title=Primate Factsheets: Proboscis monkey (''Nasalis larvatus'') Taxonomy, Morphology, & Ecology |date=n.d. |website=Primate Info Net |publisher=[[University of Wisconsin–Madison]] |access-date=21 August 2012 |quote=}}</ref><ref>{{cite web |url=http://www.brudirect.com/index.php/Special-Features/up-close-with-borneo-primates.html |title=Up Close With Borneo Primates |date=2 July 2012 |website=Special Features |publisher=Brudirect |access-date=21 August 2012}}</ref> The male has a red penis with a black scrotum.<ref name=Ankel2007/>

The proboscis monkey has a long coat; the fur on the back is bright orange, reddish brown, yellowish brown or brick-red.<ref name=Ankel2007/><ref name=Payne1985>{{cite book |last1=Payne |first1=J. |last2=Francis |first2=C. M. |last3=Phillips |first3=K. |year=1985 |title=A field guide to the mammals of Borneo |location=Kuala Lumpur, Malaysia |publisher=World Wildlife Fund Malaysia & The Sabah Society |isbn=9679994716}}{{Page needed|date=August 2023}}</ref> The underfur is light-grey, yellowish, or greyish to light-orange.<ref name=Ankel2007/><ref name=Payne1985/> Infants are born with a blue coloured face that at 2.5 months darkens to grey.  By 8.5 months of age, the face has become cream coloured like the adults.<ref name=":0">{{Cite web|url=http://animaldiversity.org/accounts/Nasalis_larvatus/ |title=''Nasalis larvatus'' (proboscis monkey) |last=Woltanski |first=Amy |date=2004 |website=Animal Diversity Web |publisher=University of Michigan Museum of Zoology |access-date=15 March 2017 }}</ref> Both sexes have bulging stomachs that give the monkeys what resembles a pot belly. Many of the monkeys' toes are webbed.<ref name=Ankel2007/>

=== Nose ===
[[File:Nasalis larvatus Paris 150110.jpg|thumb|Nasal cartilages that were left intact in a specimen skull in order to show the structures that support the nose]]
Further adding to the dimorphism is the large nose or [[proboscis]] of the male, which can exceed {{convert|10.2|cm|in|abbr=on}} in length,<ref>{{cite journal|last=Ellis |first=D. |date=1986 |title=Proboscis monkey and aquatic ape |journal=Sarawak Museum Journal |volume=36 |issue=57 |pages= 251–262}}</ref> and hangs lower than the mouth. Theories for the extensive length of their nose suggest it may be sexual selection by the females, who prefer louder vocalisations, with the size of the nose increasing the volume of the call.<ref>{{Cite web|url=http://www.worldlandtrust.org/education/species/proboscis-monkey|title=Proboscis Monkey |website=World Land Trust |access-date=2017-03-15}}</ref><ref name=Ankel2007>Ankel-Simons F. (2007) [https://books.google.com/books?id=Mwl3M6c5KzoC Primate Anatomy: an introduction], 3rd Ed. San Diego: Academic Press {{ISBN|0080469116}}.</ref><ref name=Payne1985/>

The nose is smaller in the female and is upturned in the young.<ref name=Britannica>{{cite web|url=https://www.britannica.com/animal/proboscis-monkey|title=proboscis monkey|author=<!--Not stated-->|date=19 Feb 2020|website=www.britannica.com|publisher=Encyclopedia Britannica Inc.|access-date=11 Feb 2022}}</ref> Nevertheless, the nose of the female is still fairly large for a primate. The skull of the proboscis monkey has specialized [[nasal cartilages]] that support the large nose.<ref name=":1" />