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...
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Notes

01 December 1933 Comments Notes I T is with the greatest regret t h a t we have to announce the death at Berlin, on the 10th of November, after an illness of only three days, of Dr. Ernst Hartert. Dr. Hartert was renowned as an ornithologist all over the world, but in no country was he...
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Territory Reviewed

01 December 1933 Comments Main paper I T is now some twenty-five years since the theory of " territory " in bird life was enunciated b y Eliot Howard (1907-14, 1920, 1929) as the result of his intensive study of the behaviour of some of the Warblers and Buntings. The attractive nature of the...
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