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Symphalangus syndactylus

Siamang Gibbons are apes, not monkeys. One way to distinguish apes from monkeys is that apes do not have tails.

Siamang Gibbons are known for their calls, and paired males and females create their own unique “song.” It consists of a series of booms and barks, and is amplified by their inflatable throat sacs.  Even the couple’s kids get involved; each one adds their own sound to the call.  

Siamang Gibbons are one of the 43 Species Survival Plan animals cared for by the Great Plains Zoo. This species’ numbers have declined by at least 50 percent over the past 40 years due primarily to hunting for the pet trade and continued habitat loss. 

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