Andean condor
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Found in articles
Donazard, José A (2002). „Social structure of Andean Condor roosts: Influence of sex, age, and season”. Condor (journal) 104 (1), 832–837. o, Kiadó: Cooper
(1999) The Origin and Evolution of Birds Yale University Press ISBN 0-226-05641-4 p. 300 (1942) „The Pterylosis of the Andean Condor”. Condor (journal) 44
) Mascitti, V. and Kravetz, F.O., "Bill Morphology of South American Flamingos". The Condor. 104(1), 73. Johnson, A.W., Behn, F., and Millie, W.R. "The
California Condor in Nevada”. Condor (journal) 33 (1), 32. o. DOI:10.2307/1363932. Wetmore, Alexander (1931). „The California Condor in New Mexico”. Condor (journal)
tarsometatarsusa Nadin, Elisabeth. „Tracing the Roots of the California Condor”, Caltech News, California Institute of Technology, 2007. október 26. (Hozzáférés: