Authenticated by Dr David J. Chivers, University of Cambridge.
Glossary
Arboreal: living in trees.
Brachiation: in some Primates, a method of locomotion when the animal swings hand over hand from branch to branch.
Monogamy: Mating system in which a male and female mate exclusively with each other. The pair bond may last for one season or may be life-long.
Subspecies: a population usually restricted to a geographical area that differs from other populations of the same species, but not to the extent of being classified as a separate species.
Burnie, D. (2001) Animal.Dorling Kindersley, London.
Ankel-Simons, F. (2000) Primate Anatomy: An Introduction.Academic Press, San Diego.
Chivers, D.J. (2005) Pers. comm.
Geissmann, T. (1997) New sounds from the crested gibbons (Hylobates concolor group): First results of a systematic revision. In: Zissler, D. (Ed) Verhandlungen der Deutschen Zoologischen Gesellschaft: Kurzpublikationen – Short Communications.Gustav Fischer Verlag, Stuttgart.
Geissmann, T. (1990) Systematics of crested gibbons (Hylobates concolor group). Abstracts, International Symposium on Primate Conservation in China.Kunming Institute of Zoology, Kunming.