siamang

siamang

[see-uh-mang]
noun
a large, black gibbon, Hylobates syndactylus, of Sumatra and the Malay Peninsula, having very long arms and the second and third digits partially united by a web of skin: an endangered species.

Origin:
1815–25; < Malay

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siamang (ˈsaɪəˌmæŋ)
 
n
a large black gibbon, Hylobates (or Symphalangus) syndactylus, of Sumatra and the Malay Peninsula, having a large reddish-brown vocal sac beneath the chin and the second and third toes united
 
[C19: from Malay]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Encyclopedia Britannica
Encyclopedia

siamang

arboreal ape of the gibbon family (Hylobatidae), found in the forests of Sumatra and Malaya. The siamang resembles other gibbons but is more robust. The siamang is also distinguished by the webbing between its second and third toes and by a dilatable hairless air sac in its throat. The air sac is used in producing a resonant, booming call. The siamang is about 50-55 centimetres in head and body length. Its shaggy fur is completely black. Like the gibbon, the siamang is diurnal and arboreal and moves by brachiation, progressing from one point to another by swinging from its arms. It feeds mainly on fruit and has been observed to live alone or in small groups. The gestation period is about 230 days; births are typically single. Kloss' gibbon (H. klossi) is sometimes called a dwarf siamang; both it and the siamang were formerly classified in a separate genus, Symphalangus.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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