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Harlequin ducks (Histrionicus histrionicus) are Yellow-listed in both British Columbia and Alberta, and are listed as a sensitive species in most of the northwestern United States. Moulting and wintering aggregations in the Strait of Georgia include birds known to breed in British Columbia, Alberta, Montana, Idaho, Washington, and Oregon. The wintering population estimate for the Strait of Georgia is 11–15,000 birds, based on capture–mark–recapture studies. Research at White Rock, B.C. shows annual survival rates of 0.82 for adult males, and 0.74 for adult females. Breeding area studies in Banff National Park and Kananaskis Country, Alberta, show that the additional mortality of females takes place during nesting and brood rearing. Breeding ground studies and age ratio counts at the wintering area show that annual productivity and survival of juveniles are both low, resulting in low annual recruitment...
Smith, Cyndi M., Cooke, Fred; Robertson, Gregory J.; Goudie, R. Ian; Boyd, W. Sean. 1999. Population Dynamics of Harlequin Ducks in British Columbia and Alberta (in Proc. Conference Biology & Management of Species and Habitats at Risk). Ministry of Environment, Lands and Parks; University College of the Cariboo. Conference Biology & ManagementProceedings
Keywords: Alberta, Banff National Park, demographic parameters, harlequin duck, Histrionicus histrionicus, productivity, Strait of Georgia, survival rate
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Scientific Name: Histrionicus histrionicus
ISBN:
English Name: Harlequin Duck
Other Identifier: University College of the Cariboo
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