Delany, S / December 1993 – vol. 86, issue 12, pp 591–599 The Canada Goose Branta canadensis and the Greylag Goose Anser anser have large introduced populations in Britain which are expanding rapidly. A remarkable diversity of other goose species of captive origin is also now at large, and small numbers of a great variety of hybrids are to be found. The Wildfowl & Wetlands Trust organised a survey during the moulting period of Canada and Greylag Gees... This article is only available to registered users.To read more, please log in or purchase a subscription.