Authenticated (31/05/2006) by Matt Richardson, independent primatologist and writer.
Diurnal: Active during the day.
Gestation: The state of being pregnant; the period from conception to birth.
Inbreeding depression: The decreased vigour in terms of growth, survival or fertility that follows one or more generations of interbreeding between closely related individuals.
Monogamous: Having only one mate during a breeding season, or throughout the breeding life of a pair.
Nocturnal: Active at night.
Primary forest: Forest that has remained undisturbed for a long time and has reached a mature condition.
Secondary forest: Regenerating forest that has not yet reached the mature state of primary forest.
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.
Territory: Area occupied and defended by an animal, a pair of animals or a colony.