Silvery gibbon

Appearance

Its coat is bluish-grey, with a dark grey or black cap. Like all gibbons, the silvery gibbon lacks an external tail, has dorsally placed scapulae, and reduced flexibility in its lumbar region.

On average, it reaches 8 kg (18 lb) in weight.

Range and habitat

It is endemic to the Indonesian island of Java, where it inhabits undisturbed rainforests up to an altitude of 2,450 m (8,040 ft). It is diurnal and arboreal, climbing trees skilfully and brachiating through the forests.

Pins are Wikidata “endemic to” fields. Orange dots, when present, are GBIF occurrence tiles — survey bias included.

Diet

Its diet consists of fruits, leaves, and flowers.

In crisis

It has been listed as Endangered on the IUCN Red List since 2008, as the wild population is estimated to comprise less than 2500 mature individuals. The silvery gibbon ranks among the most threatened primates. It is listed as Endangered on the 2009 IUCN Red List, with the population appearing more stable than in a 2004 assessment of the species being Critically Endangered, that suggested there was a 50% chance of the silvery gibbon becoming extinct within the next decade.

There are also a dozen small, non-viable populations. Mount Halimun Salak National Park sustains the largest population of ca. 1,000 gibbons.

CITES lists this taxon on Appendix I. Confirm the current appendix on the CITES checklist.

Silvery gibbon is Endangered on this catalog because that is the IUCN category stored on Wikidata. Confirm the official criteria and any later count on iucnredlist.org.

Sources

Written for this catalog from the English Wikipedia article on Silvery gibbon, Wikidata item Q663728. Family and order context is original field-guide writing about the group, not a copied assessment of this one species. Wikipedia text is CC BY-SA. Not an IUCN assessment. Counts, when quoted, can change — confirm them on the recovery programme and on iucnredlist.org.