272 STUDIES IN BIRD-MIGRATION 



Blackcap, Sylvia atricapilla, — One killed during a 

 rush of migrants on 29th October 1908, was sent to 

 me. There is a doubtful record, 8th March 1904. 



Garden- Warbler, Sylvia borin. — The bird seen 

 from 1 6th to i8th September 1904, as already related 

 (p. 257), is the only known instance of the visit of this 

 bird, and the second one for the Outer Hebrides. 



Willow- Warbler, Phylloscoprts trochilus. — There 

 are a few records of the visits of single examples of this 

 bird for both spring and autumn. In spring one was 

 obtained early in May 1909; one on 14th May 1906; 

 and one on 3rd June 1906 ; all of which were sent. 



The autumn visits were for 2nd August 1904, 30th 

 September 1907, and 19th October 1907. 



Sedge- Warbler, Acrocephalus schoeitobcemts. — Has 

 twice been known to visit the island — namely, on i6th 

 June 1905 and early in May 1907. Both the birds 

 were sent for determination. 



Song-Thrush, Ttirdtis niusicus. — Occurs on passage 

 in both spring and autumn, and occasionally as a visitor 

 during severe weather in winter. 



Has been observed in spring as early as 20th 

 February, and on passage during March and on 

 ist April. 



In autumn has occurred from ist October to 19th 

 November, often in great numbers with other migrants. 



Redwing, Ttirdus iliacus. — A regular visitor in 

 numbers during both seasons of passage ; and an 

 occasional visitor during severe weather, especially snow, 

 in winter. 



There are occurrences in the latter half of February 

 and during March, of many birds in April, and of 

 stragglers down to 14th May. 



