THE BIRDS OF FAIR ISLE 129 



(see Diary of Movements). That the second known 

 visit to our islands of this pretty Httle Warbler should, 

 like the first, have been to one of the most remote spots 

 within the British area, seems on first thoughts somewhat 

 strange. It must be remembered, however, that in such 

 corners as St Kilda and Fair Isle, should there be 

 anyone there to notice them, waifs like these are more 

 likely to be detected than elsewhere. If this bird, which 

 is a summer visitor to Southern Europe and Northern 

 Africa, has found its way to such distant parts of the 

 British area, it must surely have occurred elsewhere 

 with us. 



Phylloscopus sibilatrix, Wood- Warbler. — The 

 few Fair Isle records for the visits of this species, and 

 the single visit to Sule Skerry, are the only instances 

 known to me which suggest the occurrence of this species 

 as a bird of passage in the British Islands. Until the 

 year 1910, two single birds only had been observed in 

 spring, namely, on 6th June 1907, and 5th May 1909. 

 On 1 2th May 1910, quite a number arrived, and chiefly 

 resorted to the face of the cliffs, and were excessively 

 confiding, for several that came to the top sought insects 

 at my feet. Here these birds, or other arrivals, 

 continued to be observed until the i8th. 



For the autumn there are only two records for its 

 appearance, namely, on 2nd August 1907, and 21st 

 August 191 1. It is probable that during recent years 

 the breeding range of this species has extended west- 

 wards of the Christiania Fjord, and that this may 

 explain the bird's visits on migration to the British 

 Heligoland. 



Phylloscopus trochilus. Willow -Warbler. — As 

 one would naturally expect, the Willow-Warblers 

 IL I 



