Authenticated (24/11/2006) by Dr. John P. Carroll, Chair of the IUCN-SSC/BirdLife International/WPA Partridge, Quail and Francolins Specialist Group. http://www.gct.org.uk/pqf/
Glossary
Primary forests: forests 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.
del Hoyo, J., Elliott, A. and Sargatal, J. (1994) Handbook of the Birds of the World - New World Vultures To Guineafowl. Vol. 2.Lynx Edicions, Barcelona.