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Letters

01 August 1952 Comments Letters SIRS,--The Ibis for April 1953 will include a group of papers on Visible Migration (particularly in passerine birds) as observed in various countries. The newly-formed Sub-committee on Visible Migration of the British Trust for Ornithology (see below) fee...

Territory in the Great Crested Grebe

01 December 1934 Comments Main paper I N their review of territory in bird life, D. and L. Lack (6) consider t h a t the claims for territory have been much exaggerated and that, especially, there is not adequate proof in any species t h a t territorial behaviour has food value. I t was furt...

Letters

01 October 1934 Comments Letters SIRS,--Mr. R. L. Brown, in his interesting notes on the Kingfisher (antea, p. 83), reports a pair of birds having a clutch several days incubated when they had at the same time a brood in an adjacent nest. The experience especially interested me because t...

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Letters

Territory in the Great Crested Grebe

Letters

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