Birds of Britain 



The general colour above is ash grey faintly barred with 

 slate on the upper tail coverts. Under parts whitish barred 

 with grey. The young bird is hardly barred at all and 

 somewhat resembles a large Garden Warbler. Length 

 6 '5 in. ; wing 3 '4 in. 



THE SUB-ALPINE WARBLER 



Sylvia subalpina, Bonelli 



Breeding numerously in Spain and South-East France, 

 this species has only once occurred here, namely on St. 

 Kilda in June 1894. 



The upper parts are dull grey and under parts chestnut. 

 There is a red ring round the eye and a conspicuous white 

 moustache-like streak extending backwards from the bill. 

 The female is much duller and the under parts are pale buff. 

 Length 4'7 in. ; wing 2 '3 in. 



THE DARTFORD WARBLER 



Sylvia undata (Boddaert) 



This bird, which is extremely rare and local with us, is 

 the only resident member of its genus in these islands. 

 Braving as it does our changeable and stormy climate, it is 

 perhaps not surprising that its numbers are few, for, feeding 

 almost entirely on insects, it must at times suffer severely 

 from lack of food. Local, perhaps, is hardly a strong enough 

 word to express the very stay-at-home habits of this cheery 



