81 



first, and those on the western side of the country being 

 considerably in advance of those on the east : thus numbers 

 had reached Lancashire and C'umberland, and others had 

 })enetrated some distance into the Clyde area before tliere 

 was any appreciable increase in East Anglia^ Nottingham 

 and Lincoln, and the first record for Nortlmmberland was 

 coincidental with that from Argyll. The magnitude of the 

 movement on the western side was also shown by the large 

 numbers passing north by a coastal route. This was indicated 

 by the number of records and the very considerable number 

 of individuals recorded from the light-stations between 

 Lundy Island (N. Devon j and the Isle of Man and tho 

 Lancashire coast during that jieriod. A similar but smaller 

 movement by a route up the east coast was indicated hy the 

 occurrences at the lights on the Yorkshire coast on the 19th 

 and 20th. 



A second extensive innnigration, chiefly on the western 

 half of the south coast, took place during the first half of 

 May: commencing on the 4th, arrivals took place daily up to 

 the 8th and then intermittently up to the 15th. The majority 

 of these birds were no doubt passage-migrants on their 

 way to more northerly nesting-areas. It was doubtful from 

 the records whether any considerable number passed 

 through the country ; for our own birds being at that time 

 very numerous, passage-migrants were difficult to detect. 

 Tliere can be no doubt, however, that very considerable 

 numbers passed north by both the east and west coast routes 

 as was shown by the records from the light-stations, which 

 indicate that these passage-movements were in progress until 

 the end of May. 



Willow- Warblers were nesting in Radnor on the 21st of 

 April and in Glamorgan and Shropshire on the 24th and 

 25th, while nests with eggs were found in Cheshire on the 

 29th, in Yorkshire on the 5th of May, in Wiltshire and 

 Staffordshire on the 6th, in Derby on the 17th, in Oxford 

 on the 19th and in Perthshire on the 2ord. 



An example of the Northern AVillow-Warbler {Pfii/lloscoj»is 

 truchilits eversmanni) was killed at Hunois light (Guernsey) 

 on the tJth/7rh of May. 



