So ANNALS OF SCOTTISH NATURAL HISTORY 



The Wood \Varbler is only known to have visited 

 Norway on one occasion, but is found in Sweden up to the 

 60"^ N. lat. Possibly some of the Swedish birds may move 

 westwards when emigrating in the autumn, and in this way 

 reach the Norwegian coast, whence they depart for the 

 south, travelling by the well-known route which traverses 

 the British shores. 



Chiff-Chaff, Pliylloscopus nifus. — This bird was newly 

 detected as a spring visitor; one, captured on 24th May, 

 having been forwarded to me for identification. It is 

 doubtless more frequent at this season than is supposed, 

 for it is an easily overlooked species, especially at Fair Isle, 

 where so many insectivorous visitors resort to the faces of 

 its twenty miles of lofty encircling cliffs. In the autumn 

 it was present during the second or third weeks of October. 



149. Siberian Chiff-Chaff, Fhylloscopiis tristis. — This Eastern 



species has recently been admitted to a place in the 

 British avifauna on the strength of a specimen captured at 

 the lantern of the Sule Skerry lighthouse on the night of the 

 23rd September 1902 ("Ann. Scot. Nat. Hist." 1907, 15). 

 The ornithological investigations at Fair Isle during 1907 

 have fully justified the claim of this bird to be regarded as a 

 British species, for in the past autumn four examples were 

 captured during the fourth week of October, and as others 

 were seen it is probable that species was present in some 

 numbers at the time. 



The four specimens referred to were all females. The 

 first was taken on the 21st October, and the other three on 

 the 24th. 



Since the above was penned I have received for deter- 

 mination a specimen in the flesh from Orkney, where some 

 of these birds have evidently passed the winter. On 

 5th February, Mr. Wm. Cowan, who forwarded the bird 

 to me, received one of two which had frequented some 

 nursery grounds at Kirkwall for a fortnight, being first 

 noticed on 25th January. This bird had killed itself in at- 

 tempting to escape from one of the greenhouses into which 

 it had ventured, and had been shut in. 



Yellow-browed Warbler, Phylloscopus stiperciliosus — In the 

 autumn of 1907, this interesting little migrant either did 

 not occur, or escaped notice, until 13th October when a 

 single bird was observed. Single examples were also seen 

 on the 22nd and 29th, and two on the 21st. 



150. Grasshopper Warbler, Locustella navia. — Like the Wood 



Warbler, this is an hitherto unrecorded bird for the 



