Silvery Gibbon

(Hylobates moloch)




Facts about this animal

The Silvery Gibbon has a long, dense and shaggy fur. The colour is silvery grey in both sexes and all ages. The cap and chest are darker grey than the rest or even black. Both sexes have a pale brow-band. The face is black and naked, the ears are also black and not hidden in the fur. The weight is about 5.9 kg.

Did you know?
That all gibbon species are monogamous? Family groups consist of mated pair and offspring. They establish small, stable home ranges which they will defend.


Suborder SIMIAE
Name (Scientific) Hylobates moloch
Name (English) Silvery Gibbon
Name (French) Gibbon cendré ou Gibbon argenté
Name (German) Silbergibbon
Name (Spanish) Gibón ceniciento
CITES Status Appendix I
CMS Status Not listed



Photo Copyright by
Gerald Cubitt



Range Java (Indonesia)
Habitat Tropical Rainforest
Wild population 4,000-4,500 individuals (1994-2002), in 15 different locations (Red List IUCN 2011)
Zoo population 87 registered by the International studbook (incomplete data from Indonesia, 2004), 58 reported to ISIS (2006)

In the Zoo

Silvery Gibbon


How this animal should be transported

For air transport, Container Note 33 of the IATA Live Animals Regulations should be followed.


Find this animal on ZooLex


Photo Copyright by
Karen Payne

Why do zoos keep this animal

The silvery gibbon has already lost 98% of its original habitat and the pressure on the remaining forest is extreme. Only an estimated 400 to 3000 silvery gibbons now exist in some 21 discontinuous forest patches. The current fragmented sub-populations are not sufficiently large to be considered evolutionally viable and will require active conservation management for long term survival. Ex situ breeding programmes established under an International Studbook (1991)also have a vital role to play in the survival of the species. Currently only a few silvery gibbons are held in zoos outside Indonesia in coordinated breeding programmes. These zoos participate also in in situ conservation projects. It is highly recommended that Indonesia establish such programmes within its zoos.