Survival, emigration, and winter population structure of Harlequin Ducks

Article Abstract:

A wintering population of Harlequin Ducks were studied for age and sex-specific survival and emigration rates, to determine how young birds join the population, detect when males and females leave the population and gain and understanding of the roles of survival and dispersal on local population demography. Some juveniles joined the wintering grounds with their mothers, and young males were more likely to disperse in the first two years of life, than young females. Adult males survived longer than adult females during the summer months.

Bird migration

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Long-term pair bonds in Harlequin ducks

Article Abstract:

The frequency of pair reunion in Harlequin Ducks in breeding streams in Alberta was documented. Harlequin Duck pairs reunite on the wintering area, returning to the breeding stream together, even if the female is not successful at breeding the previous season. This indicates that reuniting with the same mate each year is important.

Sexual behavior in animals, Poultry breeding, Animal sexual behavior

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Post-fledging broods of migratory Harlequin Ducks accompany females to wintering areas

Article Abstract:

Research describing the winter movements of Harlequin Ducks (Histrionicus histrionicus) is presented. In particular observations of female-offspring groups moving to wintering areas together are analysed.

Case studies, Ornithological research, Birds, Animal wintering

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