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Fall Migration of the Black Duck

C. E. AddyU.S. Fish and Wildlife Service

出版	U.S. Department of the Interior, 1950
URL	http://books.google.com.hk/books?id=KubqaKM8d_AC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN

註釋

This paper brings together the results of black-duck banding throughout North America, and attempts to show, for the benefit of sportsman and administrator alike, where the birds of Barnegat Bay, St. Clair Flats [St. Clair Flats Wildlife Area, Michigan], or any other important hunting area come from. The banding may shed some light also on the questions when do the various groups of birds move and when might they be expected to arrive from certain regions to the north under conditions existing today.