Those Ruddy Ducks. The status of the Ruddy Duck Oxyura jarnaicensis seems to be causing much heartache among birdwatchers at present (e.g. Brit. Birds 86: 338). The fact that it has started to hybridise with the small population of the endangered White-headed Duck O. leucocephala in Spain has prompted cries of anguish from the Spanish, who have done much to reverse the decline in the White-he


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