Letters

01 December 1984 Comments Letters Tufted Duck carrying young. In connection with the recent notes by Montse Carbonell and Stephen B. Edwards (Brit. Birds 77: 318-319), I should like to draw attention to a previous published account by my husband, the late Dr Jeffery Harrison, of a fema...
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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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