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Article
W. Sean Boyd, Auteur ; Fred Cooke, AuteurDans Wildfowl (51 2000)The long-term changes in the size of the Lesser Snow Goose (Anser c. caerulescens) population that breeds on Wrangel Island, Russia, and its associated wintering populations in North America are described. In contrast to exponential increases in[...]
Article
Cyndi Smith, Auteur ; Fred Cooke, Auteur ; R. Ian Goudie, AuteurMost ducks (Subfamily Anatinae) progress through a sequence of moults from natal downy plumage to definitive alternate plumage. The accurate identification of age classes by plumage allows the proportion of immature males to adult males in the a[...]
Article
Lucy Ferrer, Auteur ; Stephen Newman, Auteur ; Sophie Barker, Auteur ; Fred Cooke, AuteurTimed sea-watches were carried out at Holme Bird Observatory, Norfolk, UK, between May 2005 and December 2015. The rate of passage of 20 species was calculated as the number of birds passing the observation point per 10 hours. Analysis of the ra[...]
Article
Johnny Kahlert, Auteur ; Malcolm Coupe, Auteur ; Fred Cooke, AuteurDuring the late winter and spring of 1997, sex-ratios and pairing chronology of Red-breasted Mergansers were studied in the Fraser River Estuary, south west Canada. Until late March at one site, English Bay, there was a strong male-bias, whereas[...]
