# Siamang (*Symphalangus syndactylus*)

Canonical page: https://creaturedata.com/animals/siamang  
Data as of: 2026-11-11

The siamang (Symphalangus syndactylus) is a mammal in the order Primates and the family Hylobatidae, within the superfamily Hominoidea. It is a medium-sized primate with an adult body mass of 10.84 kg, and it is a diurnal, arboreal frugivore. Gestation lasts from 230 to 234 days, litters hold 1 young, and sexual maturity comes at 6.4 years. The siamang is listed as Endangered (EN) on the IUCN Red List, a threatened category.

## Quick facts

| Fact | Value |
|---|---|
| Weight | 10.8 kg |
| Length | Not recorded |
| Height | up to 1 m |
| Lifespan | 38 years – 43 years |
| Diet | Frugivore |
| Main food | Not recorded |
| Habitat | forest |
| Gestation | 231 days |
| Young per litter or clutch | 1.02 |
| Age at maturity | 6 years – 6.72 years |
| Litters or clutches a year | 0.4 |
| Active | By day (diurnal) |
| Lifestyle | Arboreal |
| Conservation status | Endangered (IUCN) |
| Countries on record | Not recorded |

## Classification

- kingdom: Animalia
- phylum: Chordata
- class: Mammalia
- order: Primates
- family: Hylobatidae
- genus: Symphalangus
- species: *Symphalangus syndactylus* (Raffles, 1821)

Synonyms: *Hylobates syndactylus*, *Simia gibbon*, *Simia syndactyla*, *Symphalangus continentis*, *Symphalangus gibbon*, *Symphalangus subfossilis*, *Symphalangus syndactylus continentis*, *Symphalangus syndactylus volzi*, *Symphalangus volzi*

## Common questions

### What kind of animal is the siamang?

The siamang is a mammal in the order Primates, belonging to the family Hylobatidae and the superfamily Hominoidea.

### How heavy is a siamang?

An adult Siamang has a body mass of 10.84 kg, with a highest reported value of 10.87 kg. This places it in the medium size class.

### What does the siamang eat?

The siamang is a frugivore, placing it at the herbivore trophic level.

### Is the siamang endangered?

Yes. The siamang is listed as Endangered (EN) on the IUCN Red List, which is a threatened category.

### How long does a siamang live?

The siamang has a lifespan of 38 years, and the highest value reported by sources is 43 years.

### How many young does a siamang have?

A siamang has 1 young per litter, with 0.4 litters per year, after a gestation period of 231 days.

## Sources

- [An amniote life-history database to perform comparative analyses with birds, mammals, and reptiles](https://doi.org/10.6084/m9.figshare.3563457.v1), CC0 1.0, E096-269. Myhrvold, N.P., Baldridge, E., Chan, B., Sivam, D., Freeman, D.L. & Ernest, S.K.M. (2015) An amniote life-history database to perform comparative analyses with birds, mammals, and reptiles. Ecology 96: 3109. https://doi.org/10.1890/15-0846R.1. Data: https://doi.org/10.6084/m9.figshare.3563457.v1
- [Catalogue of Life eXtended Release](https://www.checklistbank.org/dataset/316691), CC BY 4.0, 2026-10-16 XR. Catalogue of Life (2026). Catalogue of Life eXtended Release, version 2026-10-16 XR. Catalogue of Life Foundation, Amsterdam, Netherlands. https://doi.org/10.48580/dgzlf
- [Wikimedia Commons](https://commons.wikimedia.org), per file (CC0 / public domain / CC BY green, CC BY-SA amber, anything else not displayed), 2026-11-11. Wikimedia Commons contributors. Wikimedia Commons. https://commons.wikimedia.org (each file credited to its author under its own licence).
- [EltonTraits 1.0: species-level foraging attributes of the world's birds and mammals](https://doi.org/10.6084/m9.figshare.3559887.v1), CC0 1.0, 1.0. Wilman, H., Belmaker, J., Simpson, J., de la Rosa, C., Rivadeneira, M.M. & Jetz, W. (2014) EltonTraits 1.0: Species-level foraging attributes of the world's birds and mammals. Ecology 95: 2027. https://doi.org/10.1890/13-1917.1. Data: https://doi.org/10.6084/m9.figshare.3559887.v1
- [Wikidata](https://www.wikidata.org), CC0 1.0, 2026-11-11. Wikidata contributors. Wikidata. https://www.wikidata.org (data retrieved via the Wikidata Query Service).
- [Wikipedia (English)](https://en.wikipedia.org), CC BY-SA 4.0, 2026-11-11. Wikipedia contributors. Wikipedia, The Free Encyclopedia. https://en.wikipedia.org (text under CC BY-SA 4.0; each block names its article and revision).

Cite as: Siamang (Symphalangus syndactylus). Retrieved from https://creaturedata.com/animals/siamang