A gibbon, as you can tell from this photograph, is an anthropoid ape. There are about a dozen different species in the two genera of gibbons, Hylobates and Symphalangus . The males are black with white or reddish cheek patches while females are buff or golden with black patches. A female can be seen in the lower-left corner of this photograph.
Gibbons are somewhat unique among the anthropoid apes in that when they walk, they are bipedal.
Other anthopoid apes tend to walk on all fours. They are also the only higher primates that are monogamous. Like humans, they live in family groups with a mated pair and their offspring. All of the photographs of gibbons on this web site were taken at the Minnesota Zoo. The Oakland Zoo has articles on the Siamang and White-handed Gibbon.