Letters

01 May 1971
Comments Letters Feather wear in Guillemots In view of R. J. Kennedy's note on feather wear in Guillemots Uria aalge (Brit. Birds, 63: 34-36) and the follow-up in this issue (pages 229-230), I should like to point out that a good many of the auks involved in the disaster ...
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Notes

01 May 1971
Comments Notes Display-flight of Sparrowhawks I was interested in the note by R. A. Hume and P. L. Garvey on the possible display-flight of four Sparrowhawks Accipiter nisus on 25th January 1970 (Brit Birds, 63: 132). The unusual features were the number involved and th...
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Recent reports

01 May 1971
Comments News and comment These are largely unchecked reports, not authenticated records The last summary (Brit, Birds, 64: 135-136) covered the rarer species and most of the unseasonal summer visitors in December 1970 and January 1971. This one deals with the remaining reports in...
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News and Comment

01 May 1971
Comments News and comment Birds of Estuaries Enquiry This joint project of the British Trust for Ornithology and the Royal Society for the Protection of Birds was outlined in 'News and comment' last year (Brit. Birds, 63: 183). The first report of the pilot survey, covering the p...
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Robin recaptures on Fair Isle

01 June 1962
Comments Main paper O N F A I R ISLE, Shetland, it is the normal practice to weigh all migrant birds at the time they are first trapped, and at any subsequent recaptures. The information is stored in a card-index, with all the data for each individual on a single card. In th...
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Albinism and melanism in birds

01 June 1962
Comments Main paper T H E STUDY OF heterochtosis or colour variations in the plumage of birds is a subject that the majority of field ornithologists either ignore entirely or regard with only mild curiosity. In the early years of the present century and before that, however,...
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