REPORT 



ON THE IMMIGRATIONS OF SUMMER RESIDENTS IN 

 THE SPRING OF 1907. 



INTRODUCTORY. 



Our Third Annual Report on the spring immigration of 

 birds into this country in 1907 does not differ much from 

 its predecessors, and, as before, deals solely with the move- 

 ments of the year, no attempt having been made to compare 

 it with the previous years' records. 



A chapter on the autumn movements of 1906 has been 

 added ; but as this matter was undertaken by only a limited 

 number of observers and the period of migration was so 

 protracted, the short Appendix at the end of this Report can 

 only be regarded as an attempt to place on record the few 

 observations made. A more elaborate record of the autumn 

 migration of 1907 has been prepared and will be embodied 

 in the Report for 1908. 



To the Master and Elder Brethren of Trinity House, as 

 well as to the numerous observers who have so kindly 

 assisted us, we would here tender our heartiest thanks. 



The season under consideration was a somewhat ex- 

 ceptional one, for though the latter part of March was 

 brilliantly tine, wintry weather was experienced throughout 

 the whole of April. The effect of these conditions on the 

 immigration is somewhat doubtful. Stragglers of various 

 species appeared at a somewhat early date ; but the main 

 body of birds arrived later than usual, and the immigration 

 was at its height during the early part of May. As a result 

 of this, the " rushes " or waves of immigrants were less 

 marked and the actual period was in many cases consider- 

 ably prolonged. For example, the Sedge-Warbler appeared 



