News and comment

01 November 1966 Comments News and comment World conference of the I.C.B.P.--The 14th world conference of the International Council for Bird Preservation, held in Cambridge from n t h to 15th July 1966, was attended by representatives from 31 different countries. A wide range of topics were discus...
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Letters

01 November 1966 Comments Letters Fault-bars as a means of ageing birds Sirs,---Last year I read a letter by C. J. Mead on the ageing of birds by means of fault-bars (Brit. Birds, 58: 227-228), in which he referred to the work of W. E. Glegg who noted fault-bars on the tails of 737 bird s...
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Reviews

01 November 1966 Comments Reviews Population Studies of Birds. By David Lack. Clarendon Press, Oxford, 1966. 341 pages; 1 photographic plate; many textfigures. 63s. Dr. Lack's first book on animal populations, The Natural Regulation of Animal Numbers (1954), embraced all animals, but most...
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Letters

01 February 1948 Comments Letters S I R S , -- I t seems a n opportune moment for making a plea t h a t t h e scope of the British Trust Ringing Scheme should be widened by making rings available for use outside t h e British Islands. While we fully appreciate the organizational a n d sup...
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Reviews

01 February 1948 Comments Reviews Aristocrats'' of the Air. By Captain C. W. R. Knight. (Williams and Norgate, London, 1946). 30s. od. The first edition of this eminently readable book was first published in 1935, but has been out of print for nearly twenty years. This, the second edition...
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Notes

01 February 1948 Comments Notes DURING the years 1946 and 1947 I have noticed several species singing outside what appears to be their normal song-period as defined in The Handbook charts. Some of these variations are considerable, others less so. The particulars are as follows :-- NUT...
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