Endangered
Siamang
Symphalangus syndactylus
Siamang is a primate in the family Hylobatidae (order Primates) — Symphalangus syndactylus, recorded as Endangered.
Appearance
The face of this large gibbon is mostly hairless, apart from a thin mustache.
The average length of a Siamang is 90 cm. The largest they have ever grown is 150 cm. The largest of the gibbons, the Siamang can be twice the size of other gibbons, reaching 1 m (3.3 ft) in height, and weighing up to 14 kg (31 lb).
Range and habitat
The Siamang inhabits the forest remnants of Sumatra Island and the Malay Peninsula, and is widely distributed from lowland forest to mountain forest—even rainforest—and can be found at altitudes up to 3800 m. It lives in groups of up to six individuals (four individuals on average) with an average home range of 23 hectares. Their day ranges are substantially smaller than those of sympatric Hylobates species, often less than 1 km.
Pins are Wikidata “endemic to” fields. Orange dots, when present, are GBIF occurrence tiles — survey bias included.
Diet and breeding
The Sumatran Siamang is more frugivorous than its Malayan relative, with fruit making up to 60% of its diet. The Siamang prefers to eat ripe rather than unripe fruit, and young rather than old leaves.
In crisis
The Siamang (, also UK:. Siamang) is an endangered arboreal, black-furred gibbon native to the tropical rainforests of Indonesia, Malaysia, and Thailand. Otherwise, the Malaysian individuals are only a population. While the illegal pet trade takes a toll on wild populations, the principal threat to the Siamang is habitat loss in both Indonesia and Malaysia.
In studying these populations, infants belonging to monogamous groups were found to receive more overall male care than infants in the polyandrous groups. The burnt, regrown forest population contained more adult and subadults than the intact forest population, that had more infants, small juveniles, and large juveniles.
CITES lists this taxon on Appendix I. Confirm the current appendix on the CITES checklist.
Siamang 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 Siamang, Wikidata item Q213889. 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.
