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Molt and the basic plumage of male Harlequin Ducks.
(University of California Press, 1997-02)
Using observations on 28 individually marked male Harlequin Ducks from mid-June until late November, we describe plumage changes which occur as individuals proceed from the alternate plumage through basic to the return of ...
The Timing of Pair Formation in Harlequin Ducks.
(University of California Press, 1998-08)
The timing of pair formation varies within and among species of ducks. In this study we documented the chronology of pair formation in a population of wintering Harlequin Ducks (Histrionicus histrionicus) in southwestern ...
Egg-Laying Time and Laying Interval in the Common Eider
(University of California Press, 1993-11)
We determined the time of day at which eggs were laid and the laying interval (time between laying of successive eggs in a clutch) in the Hudson Bay race of the Common
Eider( Somateria mollissima sedentaria), at La Perouse ...
Frequency, Timing and Costs of Intraspecific Nest Parasitism in the Common Eider
(University of California Press, 1992-11)
Intraspecific nest parasitism was studied in the Hudson Bay race of the Common Eider (Somateria mollissima sedentaria), near Churchill, Manitoba (58 24'N, 94 24'W). Nest parasitism was detected by three methods: (1) multiple ...
Survival, emigration and winter population structure of Harlequin Ducks.
(University of California Press, 2000-02)
A population of individually marked Harlequin Ducks (Histrionicus histrionicus) at White Rock, British Columbia, Canada was examined to measure the degree of population differentiation among birds which pair during the ...
Winter philopatry in migratory waterfowl,1999.
(University of California Press, 1999)
Philopatry in migratory species can apply to any location used during the annual cycle. The degree of philopatry influences the genetic structure of populations, but only at the stage of the annual cycle when pair formation ...
Long-term pair bonds in Harlequin Ducks.
(University of California Press, 2000-02)
We documented the frequency of pair reunion in Harlequin Ducks (Histrionicus histrionicus) on breeding streams in Alberta, and at a molting/wintering area in southwestern British Columbia. As long as their mate is alive, ...