|Red List Category & Criteria:
A2cd; B1ab(iii,v); C2a(i)
||Meijaard, E., Nijman, V. & Supriatna, J.
||Mittermeier, R.A. & Rylands, A.B. (Primate Red List Authority)
The subspecies is listed as Endangered as it has undergone extensive population reductions across its range, and ongoing hunting and habitat destruction continue to threaten most populations. Numbers have declined by more than 50% (but probably less that 80%) over the past 3 generations (approximately 36-40 years). Also its extent of occurrence is less than 5,000 km², its distribution is now severely fragmented, and there is a continuing decline in the number of mature individuals and in the extent and quality of its habitat. In addition, its population size is estimated to number fewer than 2,500 mature individuals, there is an observed continuing decline in the number of mature individuals, and no subpopulation contains more than 250 mature individuals.