The movements of Swifts in summer

01 May 1951
Comments Main paper 1950 was a good year for studying the movements of Swifts (Apus apus). Well over 20,000 were reported during the special watch held under the auspices of the British Trust for Ornithology. This covered the arrival period prior to May 15th, 1950. Another 2...
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Editorial

01 May 1951
Comments Editorials As announced in British Birds for March a new editorial board, whose members are named on the title-page, becomes responsible for the conduct of the magazine beginning with this issue. It is intended to maintain broadly the existing traditions, standards...
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Letters

01 May 1951
Comments Letters SIRS,--A serious error has crept into t h e obituary notice of m y old friend Bernard Tucker. To quote : " The memorable Oxford University Expedition to Spitsbergen " took place in 1921 n o t 1922, and Tucker was n o t one of t h e members. I n 1922 F . C...
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Reviews

01 May 1951
Comments Reviews The Breeding-birds of the Netherlands. By A. L. J. Van IJzendoorn. (Brill, Leiden, 1950. 6.25 Guilders). Holland consists of some 33,330 sq. km. (roughly 8 million acres) of land and some 5,000 sq. km. of water, inhabited by a human population now exceedi...
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Notes

01 May 1951
Comments Notes ON April 8th, 1950, we inspected the nest of a Raven (Corvus corax). containing three eggs, situated high in the Plym Valley, Dartmoor, After we had withdrawn both Ravens flew around in the vicinity, but one, easily distinguishable by a number of missing...
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Waxwings in the winter of 1949-50

01 May 1951
Comments Main paper THE following report has been compiled at the request of the Editors, who are glad to acknowledge the response of those who have contributed notes. The British Empire Naturalists' Association have kindly allowed us to include records already published in ...
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