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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01 May 1969
Comments Notes Woodpigeons cooing at night J. N . Tomlinson's note and the accompanying editorial comment (Brit. Birds, 62: 76-77) give the impression that it is exceptional for Woodpigeons Columba palumbus to call at night. In the past 28 years, however, living in thre...
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