Authenticated (04/06/08) by Jonathan S. Walker, Ph.D., Director, Columbidae Conservation. http://www.columbidae.org.uk
Glossary
Primary: relating to forest: forest that has remained undisturbed for a long time and has reached a mature condition.
Secondary forest: forest that has re-grown after a major disturbance, such as fire or timber harvest, but has not yet reached the mature state of primary forest.
Sexual dimorphism: when males and females of the same species differ in appearance.