REPORT 



ON THE MIGEATIONS IN THE SPRING OF 1912 AND 

 THE AUTUMN OF 1911. 



INTRODUCTOEY. 



This Report, which deals with the autumn-migration of 

 1911 and the spring-migration of! 1912, has been drawn up 

 on the same lines as those previously issued. 



The number of records supplied by our observers again 

 shows a gratifying increase, and to these have been added 

 many others which had appeared in different publications 

 up to the time these pages were revised. The sections 

 dealing with the records from the light-stations round our 

 coasts will be found somewhat less voluminous than in 

 previous years, and this is chiefly accounted for by the fact 

 that in both seasons under consideration the weather, on the 

 whole, was favourable to the birds during their passage- 

 mo vements^ and consequently unfavourable for makino- 

 observations at lighi-stations. 



During the period of the spring- migration ^ the weather 

 over the area defined in the Report (p. 13), with tlie 

 exception of a few days^ was favourable to migration. 

 During March it was exceptionally mild, and though fre- 

 quently stormy, the winds were mostly from the south-west 

 and seldom of sufficient force to hinder movement, while in 

 April and May it was generally favourable. Consequently, 



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