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 critically endangered, slender-bodied arboreal colobine, endemic to northern Vietnam. Recorded at elevations between 200 to 1,200 m, its distribution is currently restricted to small fragmented tropical evergreen forests associated with steep karst limestone hills and mountains. Five isolated extant populations have been identified since its rediscovery in 1992.
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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