Hybrid resembling Ring-necked Duck. On 18th March 1984, a Ring-necked Duck Aythya collaris was reported from Tottenhill Gravel-pits, Norfolk. N. Bostock, myself and others went to see it. At about 150m it resembled a male Ring-necked Duck, but at closer range in good light a number of features pointed to its being a hybrid Tufted Duck A.fuligula X Pochard A.ferina. Its size, shape and structu

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