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| | [No title] (Site not responding. Last check: 2007-11-07) |
 | | Gibbons are small apes traditionally grouped in the genus Hylobates, though at least some authorities now divide them into four genera Hylobates, Bunopithecus, Nomascus, and Symphalangus. |
 | | Gibbons are masters of their primary mode of locomotion, brachiation, allowing them to swing from branch to branch distances of up to 50 feet, at speeds as much as 35 mph. |
 | | The siamang, which is the largest, is distinguished by having two digits on each side stuck together, hence the species name syndactylus. |
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