83 



On April tho 4tli another immigration reached Devon, 

 Dorset and Somerset ; this was followed by a further 

 imuiioration into Somerset on the Gth ; but the subsequent 

 movements of this flight cannot be traced. 



The main immigration of this species took place between 

 the 11th and IGtli of April, when numbers of~ birds landed 

 between Hants and Dorset, and their course can be traced 

 through the country as far north as Westmoreland. Between 

 the 21st and the 23rd there was another considerable immi- 

 gration in Dorset and Hants, and this was followed by the 

 first records from the eastern counties — Essex, Bedford, 

 Cambridge and Norfolk. 



The first nest was recorded in Berkshire on the 27th, 

 and the following dav a nest with two eoxrs was found in 

 Glamorgan. 



It is probable that further small immigrations occurred, 

 notably in Dorset and Wiltshire, between the 27th of April 

 and the 1st of May, and were followed by an increase in 

 Shropshire on the 3rd, in Yorkshire on the 4th, and in Cam- 

 bridge on the Gth ; but the records are not sufficiently 

 numerous to establish this with certainty. 



The ChiffchatF is not often observed at the lights, and 

 during the season of 1907 it was onl}' noted at St. Catherine's : 

 on the other hand, its congener, the Willow-Warbler, is one 

 of the commonest of the species picked up at the lights.* 



Chronological Summary of the Records. 



Seen at Penzance, C^ornwall, throughout the winter of 



1906-07. 

 March 18. Leicester. 



„ 21. Berks. 



„ 22. Kent, Bucks. 



* Od April IStli a specimen of tLe nortliern CLincliaff (I'hi/lloscopns 

 rvfus abietina, Nils.s.) was received -vvitli several examples of the common 

 form from St. Catherine's light. This is believed to be the first recorded 

 occurrence of this form in England, though it probably occurs annually 

 on migration. 



