IUCN Red List Assessment
Red List Category
Red List Criteria
Bleisch, W. & Richardson, M.
Mittermeier, R.A. & Rylands, A.B. (Primate Red List Authority)
Listed as Endangered as there are less than 1,000 mature individuals, and the species has likely declined by well over 20% in the last 2 generations (approximately 25 years).
- 1994Endangered(Groombridge 1994)
- 1990Endangered(IUCN 1990)
- 1988Endangered(IUCN Conservation Monitoring Centre 1988)