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Auteur David H. Ellis |
Documents disponibles écrits par cet auteur (3)
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Article
David H. Ellis, Auteur ; Vanya G. Rohwer, Auteur ; Sievert Rohwer, AuteurBecause many species of large birds must remain capable of flight during moult and breeding, complete replacement of all flight feathers often takes two or more years, with the result that their plumage normally includes many faded, worn and som[...]![]()
Article
David H. Ellis, Auteur ; James W. Lish, Auteur ; Marc Kéry, Auteur ; Stephen M. Redpath, AuteurFrom a year-long study of molt in the golden eagle Aquila chrysaetos, we recorded 2069 contour feathers replaced in 137 d (6 May-19 September). Very few contour feathers were lost outside this period. From precise daily counts of feathers lost, [...]



