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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Letters

01 November 1953
Comments Letters SIRS,--The points which Mr. K. Williamson makes (antea, pp. 231-32) in connection with a remark of mine on the distribution of the Alaska Wren (Troglodytes t. alascensis) (antea, pp. 48-49) are of interest not only in regard t o the evolution of wren race...
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Reviews

01 November 1953
Comments Reviews Social Behaviour in Animals. By N. Tinbergen. (Methuen, London, 1953). 12s.6d. IN The Study of Instinct (reviewed in vol. xlv, p. 182) Dr. Tinbergen was concerned with the entire study of animal behaviour and with its results up to 1948. In the present, m...
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Notes

01 November 1953
Comments Notes Effective distraction display by Mallard.--As only a few observations have been recorded indicating the effectiveness of distraction display by a parent bird in deflecting the attention of a potential predator from the young [Bird Display, pp. 104-105) t...
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