La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Delayed, not fully complete, and retarded wing-moult in November/December of a Tufted Duck Aythya fuligula
Auteurs :	Peter Koehler, Auteur ; Ursula Koehler, Auteur
Type de document :	Article
Dans :	Ornithologischer Anzeiger (45(1) AUG 2006)
Article en page(s) :	67-68
Résumé :	An adult female Tufted Duck was captured flightless November 22nd, 2005, at the RAMSAR-site "Ismaninger Speichersee mit Fischteichen", near Munich, Upper Bavaria, Southern Germany. Both primaries 10 and the right-side P 9 were old/retained, the remainder was half grown. From the length of P 9 (50 mm, including 35 mm in pin) the dates for shedding and regained flight were calculated to be Nov 10th and early December respectively. Secondaries were 20 mm shorter than inner primaries, thus indicating that primaries and secondaries were not dropped simultaneously.

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