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siamang
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A siamang (Hylobates syndactylus) with black fur sits on rocky ground, facing left, with large rocks in the background. siamang Line drawings of seven anthropoid primates-pale-headed saki, drill, tamarin, sooty mangabey, gorilla, siamang gibbon, and spider monkey-each labeled with their common and scientific names, illustrating differences in body shape and posture.
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A siamang (Hylobates syndactylus) with black fur sits on rocky ground, facing left, with large rocks in the background.
siamang (Symphalangus syndactylus) Siamang (Symphalangus syndactylus).

siamang

primate
Also known as: Hylobates syndactylus, Symphalangus syndactylus(Show More)
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Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree....
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History

siamang, (Symphalangus syndactylus), 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...

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