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Glossary
Flanks: The sides of an animal between the ribs and thigh.
Polygyny: in animals, a pattern of mating in which a male has more than one female partner.
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.
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.