Aythya valisineria
National Institutes of Health
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Breeding range and migration pattern of Tufted Ducks Aythya fuligula wintering in Switzerland: an analysis of ringing recovery…
ABSTRACrT.-We studied molt intensity and chronology in male Canvasbacks (Aythva valisineria) from termination of reproductive…
Updatings 1985-1991 to the Atlas of Breeding Birds in Provincia di Brescia(Lombardy).TheAuthor presents the following updatings…