Age-class determination of canvasbacks [Aythya valisineria]

A technique was developed to distinguish yearling from adult canvasbacks (Aythya valisineria) in the field during spring on the basis of white flecking on the distal ends of selected wing feathers. Covert feathers from adults had well-defined vermiculation patterns whereas feathers from yearlings la...

Ausführliche Beschreibung

Bibliographische Detailangaben

Veröffentlicht in:	The Journal of wildlife management 1982-01, Vol.46 (4), p.894-904
Hauptverfasser:	Serie, Jerome R., Trauger, David L., Doty, Harold A., Sharp, David E.
Format:	Artikel
Sprache:	eng
Schlagworte:	Animal wings Aythya valisineria Birds Feathers Female animals Freshwater Male animals Prairies Research facilities Waterfowl Wild birds Yearlings
Online-Zugang:	Volltext
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!