Letters

01 February 1991
Comments Letters The introduction of the Chukar In 'Points of view' (Brit. Birds 79: 656-657), Derek Goodwin drew attention to the dilution of the British population of the Red-legged Partridge Alectoris rufa by hybrids between this and other species of Alectoris. In h...
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Letters

01 June 1969
Comments Letters Bill-length as a field-character of the White-winged Black Tern ? In his paper on 'Juvenile and winter plumages of the marsh terns' (Brit. Birds, 53: 243-252) Kenneth Williamson differentiated without qualification between the bill of the Black Tern Chlid...
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