Animalia > Chordata > Mammalia > Primates > Cercopithecoidea > Cercopithecidae > Rhinopithecus > Rhinopithecus avunculus

Rhinopithecus avunculus (Tonkin snub-nosed monkey)

Synonyms: Pygathrix avunculus

Wikipedia Abstract

The Tonkin snub-nosed monkey or Dollman's snub-nosed monkey (Rhinopithecus avunculus) is a slender-bodied arboreal Old World monkey, endemic to northern Vietnam. It is a black and white monkey with a pink nose and lips and blue patches round the eyes. It is found at altitudes of 200 to 1,200 m (700 to 3,900 ft) on fragmentary patches of forest on craggy limestone areas. First described in 1912, the monkey was rediscovered in 1990 but is exceedingly rare. In 2008, fewer than 250 individuals were thought to exist, and the species was the subject of intense conservation effort. The main threats faced by these monkeys is habitat loss and hunting, and the International Union for Conservation of Nature has rated the species as "critically endangered".
View Wikipedia Record: Rhinopithecus avunculus

Endangered Species

Status: Critically Endangered
View IUCN Record: Rhinopithecus avunculus


Adult Weight [1]  18.19 lbs (8.25 kg)
Female Weight [3]  18.74 lbs (8.50 kg)
Male Weight [3]  30.86 lbs (14.00 kg)
Weight Dimorphism [3]  64.7 %
Diet [2]  Frugivore, Granivore, Herbivore
Diet - Fruit [2]  20 %
Diet - Plants [2]  70 %
Diet - Seeds [2]  10 %
Forages - Arboreal [2]  100 %
Top 100 Endangered [4]  Yes

Prey / Diet

Acer tonkinense[5]
Brassaiopsis stellata[6]
Burretiodendron hsienmu (Excentrodendron tonkinense)[5]
Garcinia fagraeoides[5]
Iodes seguinii[6]

Prey / Diet Overlap

Competing SpeciesCommon Prey Count
Macaca assamensis (Assam macaque)1


Southern Asia;



Attributes / relations provided by
1Felisa A. Smith, S. Kathleen Lyons, S. K. Morgan Ernest, Kate E. Jones, Dawn M. Kaufman, Tamar Dayan, Pablo A. Marquet, James H. Brown, and John P. Haskell. 2003. Body mass of late Quaternary mammals. Ecology 84:3403
2Hamish Wilman, Jonathan Belmaker, Jennifer Simpson, Carolina de la Rosa, Marcelo M. Rivadeneira, and Walter Jetz. 2014. EltonTraits 1.0: Species-level foraging attributes of the world's birds and mammals. Ecology 95:2027
3Wildlife As Canon Sees It
4Baillie, J.E.M. & Butcher, E. R. (2012) Priceless or Worthless? The world’s most threatened species. Zoological Society of London, United Kingdom.
5Seasonal Variation of Diet and Food Availability in a Group of Sichuan Snub-Nosed Monkeys in Shennongjia Nature Reserve, China; Li Yiming; American Journal of Primatology 68:217–233 (2006)
6Diet of the Tonkin snub-nosed monkey (Rhinopithecus avunculus) in the Khau Ca area, Ha Giang Province, Northeastern Vietnam; Le Khac Quyet, Nguyen Anh Duc, Vu Anh Tai, Barth W. Wright and Herbert H. Covert; Vietnamese Journal of Primatology (2007) 1, 75-83
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