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Report on the Immigrations of Summer Residents in the 

 Spring of 1907 : also Notes on the Migratory Movements 

 during the Autumn of 1906. By the Committee appointed 

 by the British Ornithologists' Club. (Forming Vol. XXII., 

 Bull. B.O.C. Edited by W. R. Ogil vie- Grant). 31 Maps. 

 Witherby & Co. 6s. 



This, the third Annual Report of the B.O.C. Migration Com- 

 mittee, although drawn up in the same form as previous 

 reports, is rather more ambitious in that it includes some 

 notes on autumn movements. These are too incomplete, 

 however, to have much value, but we welcome the promise 

 of a more elaborate record of autumn movements in the 

 next report. In our notice [antea, Vol. I., p. 30) of the 

 second " Report," we questioned the accuracy of the 

 table which shows the areas of the arrival of the various 

 species, and curiously enough in the present " Report " this 

 table (p. 11) is not free from blemish, the White Wagtail 

 being entered as arriving solely in the western half of the south 

 coast, whereas in the detailed summary on page 107, as well 

 as in the map, it is shown to have been reported first in Kent, 

 and similarly the table does not tally with the summaries 

 and maps in the cases of the House-Martin and Common 

 Sandpiper. It would be as well, perhaps, to omit this table 

 in future, or it may become permanently misleading, since 

 even when it is corrected it is obvious by a comparison of the 

 three " Reports " that the points of ?^ow-arrival seem due in 

 a great measure to want of observation. Each successive 

 " Report," indeed, makes one realise more and more how 

 little even the best observer is able accurately to record of 

 the movements of migrants, and only an average of the 

 results taken over a long period, as the Committee have 

 from the first insisted, can lead to any reliable conclusions. 



Some interesting points recorded in this volume may here 

 be summarized. March, 1907, was brilliantly fine, but the 

 whole of April was wintry ; the effect being that stragglers 

 arrived at early dates, but the main body of birds was delayed, 

 with the result that the " waves " of immigrants were less 

 marked, and the period of migration was extended. The 

 Blackcap was noted by many observers to be less numerous 

 than usual in 1907. Chiffchaffs were seen at Penzance 

 throughout the winter. The Cuckoo was reported on 

 March 26th (Gloucester), 29th (Hereford), 30th-31st 



