作者: Janet Kear
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摘要: The development of potato-eating and swede turnip-eating by wildfowl is linked to agricultural changes climatic conditions in Britain. tradition taking waste potatoes from harvested fields began Scotland among Mallard at least a century ago. A few Lancashire Pink-footed Geese acquired the habit about 30 years later, although did not become widespread until 1920's. On other hand, Scottish Greylag some Whooper Swans have selected regular diet for only 20-30 years. Turnip-eating has been sporadic bad weather Aberdeenshire became traditional after 1947 flocks on Isle Bute. techniques used birds dealing with roots are briefly described.