Animalia > Chordata > Mammalia > Artiodactyla > Bovidae > Bos > Bos grunniens

Bos grunniens (yak; grunting ox)

Synonyms: Bos bunnelli


Bos grunniens grunniens (Domestic yak)
Bos grunniens mutus (wild yak) (Vulnerable)

EDGE Analysis

Uniqueness Scale: Similiar (0) 
 Unique (100)
Uniqueness & Vulnerability Scale: Similiar & Secure (0) 
 Unique & Vulnerable (100)
ED Score: 6.99
EDGE Score: 3.46


Adult Weight [1]  1,488.128 lbs (675.00 kg)
Birth Weight [2]  39.683 lbs (18.00 kg)
Female Weight [1]  771.622 lbs (350.00 kg)
Male Weight [1]  1.102 tons (1,000.00 kg)
Weight Dimorphism [1]  185.7 %
Diet [3]  Herbivore
Diet - Plants [3]  100 %
Forages - Ground [3]  100 %
Female Maturity [2]  2 years
Male Maturity [2]  2 years
Gestation [2]  9 months 4 days
Litter Size [2]  1
Litters / Year [2]  1
Maximum Longevity [2]  26 years
Snout to Vent Length [1]  10.66 feet (325 cm)
Weaning [2]  7 months 18 days


Protected Areas

Name IUCN Category Area acres Location Species Website Climate Land Use
Aerjinshan Nature Reserve 11119742 China      
Ajar Valley Wildlife Sanctuary Wildlife Reserve IV 158064 Afghanistan  
Kekexili Nature Reserve 11119742 China      
Mount Everest (Sagarmatha) National Park II 275416 Nepal
Qiangtang Nature Reserve 73637404 China      

Biodiversity Hotspots

Name Location Endemic Species Website
Mountains of Southwest China China, Myanmar No


Canis lupus (Wolf)[4]
Homo sapiens (man)[4]
Uncia uncia (Snow leopard)[5]


External References


Attributes / relations provided by
1Nathan P. Myhrvold, Elita Baldridge, Benjamin Chan, Dhileep Sivam, Daniel L. Freeman, and S. K. Morgan Ernest. 2015. An amniote life-history database to perform comparative analyses with birds, mammals, and reptiles. Ecology 96:3109
2de Magalhaes, J. P., and Costa, J. (2009) A database of vertebrate longevity records and their relation to other life-history traits. Journal of Evolutionary Biology 22(8):1770-1774
3Hamish 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
4Jorrit H. Poelen, James D. Simons and Chris J. Mungall. (2014). Global Biotic Interactions: An open infrastructure to share and analyze species-interaction datasets. Ecological Informatics.
5RUKHSANA KHATOON, (2010) DIET SELECTION OF SNOW LEOPARD (Uncia uncia) IN CHITRAL AREA Master of Philosophy Thesis, Arid Agriculture University, Rawalpindi, Pakistan
6Gibson, D. I., Bray, R. A., & Harris, E. A. (Compilers) (2005). Host-Parasite Database of the Natural History Museum, London
7International Flea Database
Ecoregions provided by World Wide Fund For Nature (WWF). WildFinder: Online database of species distributions, ver. 01.06 Wildfinder Database
Biodiversity Hotspots provided by Critical Ecosystem Partnership Fund
Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset accessed via on 2023-06-13; License: CC BY 4.0