Kouprey
Bos sauveli Urbain, 1937
CRCritically Endangeredmammals
The kouprey (Bos sauveli), also called the grey ox or gray ox, is a mammal in the family Bovidae, subfamily Bovinae and tribe Bovini. It is a terrestrial, diurnal herbivore in the giant size class, with an adult body mass of 800 kg.

Quick facts about the kouprey
Each litter has 1 young after a gestation period of 260 days, and sexual maturity is reached at 2.1 years. The kouprey is listed as Critically Endangered on the IUCN Red List, a threatened category, and its lifespan is given as 11.37 years, with values up to 20 years.
- Weight
- 800 kgsrc for Weight
- Length
- Not recorded
- Lifespan
- 11.4 years – 20 yearssrc for Lifespan
- Diet
- Herbivoresrc for Diet
- Main food
- Not recorded
- Habitat
- forestsrc for Habitat
- Gestation
- 260 dayssrc for Gestation
- Young per litter or clutch
- 1src for Young per litter or clutch
- Age at maturity
- 2.07 yearssrc for Age at maturity
- Active
- By day (diurnal)src for Active
- Lifestyle
- Terrestrialsrc for Lifestyle
- Conservation status
- Critically Endangered (IUCN)src for Conservation status
- Countries on record
- Not recorded
Where does the kouprey live?
Not recorded
What is the kouprey?
The kouprey (Bos sauveli), also known as the forest ox and grey ox, is a possibly extinct species of forest-dwelling wild bovine native to Southeast Asia. It was first scientifically described in 1937.
The name kouprey is derived from the Khmer language and means "forest ox". The kouprey was defined as the national mammal of Cambodia in 2005.
The kouprey is listed as Critically Endangered and possibly extinct on the IUCN Red List. The last confirmed sighting of a wild individual took place in 1969.
From the Wikipedia article “Kouprey” (en.wikipedia.org/w/index.php?title=Kouprey&oldid=1377410821), by Wikipedia contributors, licensed under CC BY-SA 4.0 (creativecommons.org/licenses/by-sa/4.0). This block is kept separate from our own text.
Is the kouprey endangered?
The kouprey is listed as Critically Endangered on the IUCN Red List: it faces an extremely high risk of extinction in the wild.
- LCLeast Concern
- NTNear Threatened
- VUVulnerable
- ENEndangered
- CRCritically Endangered
- EWExtinct in the Wild
- EXExtinct
Category via Wikidata (CC0). Find the full assessment on the IUCN Red List. See all Critically Endangered species.
How is the kouprey classified?
- kingdomAnimalia
- phylumChordata
- classMammalia
- orderArtiodactyla
- familyBovidae
- genusBos
- SpeciesBos sauveli Urbain, 1937
Other names and names in other languages (20)
- Gray oxEnglish
- Grey oxEnglish
- Grey oxEnglish
- كوبريArabic
- ثور رماديArabic
- kuprejCzech
- Toro CupreySpanish
- kuupriFinnish
- Boeuf gris CambodgienFrench
- קופראיHebrew
- コープレイJapanese
- គោព្រៃKhmer
- 코프레이Korean
- 회색들소Korean
- kuprej azjatyckiPolish
- KupreyPortuguese
- КупрейRussian
- กูปรีThai
- KuproTurkish
- Orman Sığırı (Kupro)Turkish
Relatives of the kouprey
Other species in the same genus Bos.

Aurochs
Bos primigenius

Gaur
Bos gaurus

Wild yak
Bos mutus

Yak
Bos grunniens

Banteng
Bos javanicus
Gaur
Bos frontalis
CompareKouprey vs AurochsKouprey vs GaurKouprey vs Wild yakKouprey vs Yak
Common questions
Each answer is written from the sourced facts on this page, and only where they hold the answer.
What kind of animal is the kouprey?
The kouprey is a mammal in the family Bovidae, subfamily Bovinae and genus Bos. It is also called the grey ox or gray ox.
How heavy is a kouprey?
An adult kouprey has a body mass of 800 kg, placing it in the giant size class (adult body mass over 250 kg).
What does the kouprey eat?
The kouprey is a herbivore.
Is the kouprey endangered?
Yes. The kouprey is listed as Critically Endangered (CR) on the IUCN Red List, which is a threatened category.
Is the kouprey extinct?
No. The Catalogue of Life lists the kouprey as living, not extinct.
How long does a kouprey live?
The kouprey's lifespan is given as 11.37 years, with values reported up to 20 years.
How many young does a kouprey have?
A kouprey has 1 young per litter, after a gestation period of 260 days.
Who named the kouprey?
The kouprey, Bos sauveli, was named by Urbain, 1937.
Sources and how to cite this page
Data as of 2026-11-11. How this page is put together.
- An amniote life-history database to perform comparative analyses with birds, mammals, and reptiles · CC0 1.0 · E096-269
Myhrvold, N.P., Baldridge, E., Chan, B., Sivam, D., Freeman, D.L. & Ernest, S.K.M. (2015) An amniote life-history database to perform comparative analyses with birds, mammals, and reptiles. Ecology 96: 3109. https://doi.org/10.1890/15-0846R.1. Data: https://doi.org/10.6084/m9.figshare.3563457.v1 - Catalogue of Life eXtended Release · CC BY 4.0 · 2026-10-16 XR
Catalogue of Life (2026). Catalogue of Life eXtended Release, version 2026-10-16 XR. Catalogue of Life Foundation, Amsterdam, Netherlands. https://doi.org/10.48580/dgzlf - Wikimedia Commons · per file (CC0 / public domain / CC BY green, CC BY-SA amber, anything else not displayed) · 2026-11-11
Wikimedia Commons contributors. Wikimedia Commons. https://commons.wikimedia.org (each file credited to its author under its own licence). - EltonTraits 1.0: species-level foraging attributes of the world's birds and mammals · CC0 1.0 · 1.0
Wilman, H., Belmaker, J., Simpson, J., de la Rosa, C., Rivadeneira, M.M. & Jetz, W. (2014) EltonTraits 1.0: Species-level foraging attributes of the world's birds and mammals. Ecology 95: 2027. https://doi.org/10.1890/13-1917.1. Data: https://doi.org/10.6084/m9.figshare.3559887.v1 - Wikidata · CC0 1.0 · 2026-11-11
Wikidata contributors. Wikidata. https://www.wikidata.org (data retrieved via the Wikidata Query Service). - Wikipedia (English) · CC BY-SA 4.0 · 2026-11-11
Wikipedia contributors. Wikipedia, The Free Encyclopedia. https://en.wikipedia.org (text under CC BY-SA 4.0; each block names its article and revision).
Embed a card for this animal on your own site
Copy this code. The card shows the photo with its credit, key facts and a link back to this page.
CreatureData. (2026). Kouprey (Bos sauveli). Retrieved from https://creaturedata.com/animals/kouprey
“Kouprey (Bos sauveli).” CreatureData, 2026, https://creaturedata.com/animals/kouprey.
@misc{kouprey_2026,
title = {Kouprey (Bos sauveli)},
author = {{CreatureData}},
year = {2026},
url = {https://creaturedata.com/animals/kouprey},
note = {Data as of 2026-11-11}
}