Swan Goose Anser cygnoides (domestic forms)

Several domestic breeds of goose are descended from Swan Goose and these are covered here. Some other domestic breeds are descended from both Swan Goose and Greylag Goose, and escaped or released domestic geese in wild situations readily breed with Greylag Geese. It is not always possible to tell if a bird with signs of domestic ancestry is a pure Swan Goose or a hybrid involving both Swan Goose and Greylag Goose, however this page aims to deal with only the former.

domestic Swan Geese, Abberton Reservoir (Essex, UK), 21st August 2004