Male Siamang gibbon in tree


Siamangs are both the largest of the gibbons and the loudest: their territorial calls are amplified by a throat sac that can be inflated to the size their head. They are supremely well adapted to life in the treetops of the Malaysian and Indonesian rainforests, from their acrobatic, hand-over-hand swinging through the branches to using the branches as a bed. They are the only gibbons to have webbing between their second and third toes.

Scientific name: Symphalangus syndactylus

Rank: Species

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Map showing the distribution of the Siamang taxa

Species range provided by WWF's Wildfinder.

The Siamang can be found in a number of locations including: Asia. Find out more about these places and what else lives there.


The following habitats are found across the Siamang distribution range. Find out more about these environments, what it takes to live there and what else inhabits them.

Additional data source: Animal Diversity Web

Conservation Status


  1. EX - Extinct
  2. EW
  3. CR - Threatened
  4. EN - Threatened
  5. VU - Threatened
  6. NT
  7. LC - Least concern

Population trend: Decreasing

Year assessed: 2008

Classified by: IUCN 3.1


  1. Life
  2. Animals
  3. Vertebrates
  4. Mammals
  5. Primates
  6. Gibbons
  7. Symphalangus
  8. Siamang