Asian Rainforest: Siamang
- Video of a brachiating and walking siamang from the Oakland (CA) Zoo's website.
- http://www.oaklandzoo.org/meet_the_animals/siamang

Silvery Gibbon Project
- Hylobates moloch is a critically endangered species unique to Java in South-East Asia. Includes vocalizations, information on threatened habitat, and details of conservation efforts.
- http://www.silvery.org.au/

Primate Factsheets: White-cheeked gibbon (Hylobates leucogenys)
- Taxonomy, morphology, ecology, and behavior of this animal.
- http://pin.primate.wisc.edu/factsheets/entry/white-cheeked_gibbon

Kalaweit
- A French non-profit organisation for gibbon and siamang conservation. Projects in Borneo and Sumatra, funding and donations.
- http://www.kalaweitfm.com/kalaweituk.htm

The Singing Apes
- An article by Kashmira Kakati studying the world of the hoolock gibbons in the Borajan reserve forest in Assam.
- http://www.biosphere-expeditions.com/media/FeatureIndia.html

Gibbon Conservation Center
- Santa Clarita, California. Established in 1976 for the study, propagation, conservation and betterment of the highly endangered small ape, the gibbon. Information about the center, voluteering, and donations.
- http://www.gibboncenter.org/

Gibbon Research Lab
- Natural history, systematics, photos and sounds of all gibbon species, publications, and links.
- http://www.gibbons.de/