Siamang

Symphalangus syndactylus

The siamang, Symphalangus syndactylus, is the largest gibbon and is native to forested parts of Sumatra and the Malay Peninsula. It is black-furred, long-armed, and built for brachiation, moving through the canopy by swinging hand over hand. A large inflatable throat sac gives siamangs their carrying duet calls, which help bonded pairs maintain territory and coordinate with family members.

Siamangs are managed in zoos, sanctuaries, and conservation programs rather than private homes. They require tall complex enclosures, overhead travel routes, social grouping that respects pair bonds, and diets centered on fruit, leafy browse, and measured protein sources. Care teams monitor weight, dental condition, infant development, and social tension closely. Conservation planning is tied to forest loss, illegal trade, and coordinated breeding programs, so accurate lineage and transfer records matter when institutions maintain long-term populations.