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Glossary
Hybridisation: cross-breeding with a different species or subspecies.
Vermiculated: wormlike; often used to describe fine, wavy lines of colour on bird feathers.
Wattle: bare fleshy skin that hangs from the bill, throat or eye of birds.
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.