La Tour du Valat

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Ferruginous Ducks Aythya nyroca at "Ismaninger Speichersee and Fischteiche": Counts of moulting birds for the years 2003 to 2007 and suspected breeding in 2007.

Peter Koehler, Auteur ; Ursula Koehler, Auteur ; Eberhard von Krosigk, Auteur ; Burkhard Hense, Auteur

Dans Ornithologischer Anzeiger (46(2-3) DEC 2007)

For more than fifty years, Ferruginous Ducks have migrated to this Ramsar site near Munich, Upper Bavaria, Germany, to moult flight-feathers between July and September. From 2003 to 2007, counts averaged twelve (six to twenty five) moulting bird[...]

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