IUCN Red List Assessment
Red List Category
Red List Criteria
Yongcheng, L. & Richardson, M.
Mittermeier, R.A. & Rylands, A.B. (Primate Red List Authority)
The species is listed as Endangered as there has been a decline of over 50% in the last 3 generations (approximately 40 years) due to forest loss. This decline is continuing, though in some areas the populations are declining at a lower rate.
- 1994Vulnerable(Groombridge 1994)
- 1990Vulnerable(IUCN 1990)
- 1988Vulnerable(IUCN Conservation Monitoring Centre 1988)
- 1986Rare(IUCN Conservation Monitoring Centre 1986)