THE BIRDS OF ST KILDA 237 



(p. 87), Steele Elliot (p. 286), and Wiglesworth (p. 42) 

 all failed to find it, 



I thought it was quite likely that I should see this 

 and other species not natives of the islands, during the 

 autumn, when so many Gulls are on the move and have 

 a much wider range than at any other season ; yet, 

 although a very careful look-out was kept, only one, an 

 immature bird, came under notice. This was observed 

 feeding on the land in front of our house on 7th 

 October 191 1. It would seem that the southern move- 

 ments of certain Gulls and Terns do not extend 

 regularly as far west as the St Kilda group. 



Larus ARGENTATUS, Herring-Gull. — This is no doubt 

 the middle-sized Gull alluded to by Martin (p. 63) as 

 one of the three species of " Sea-Malls" inhabiting St 

 Kilda in 1697. It is first alluded to as the Herring- 

 Gull by Atkinson in 1839, and is mentioned by all other 

 ornithologists who have treated of the birds of this group 

 of islands. 



It is apparently not abundant in the breeding season, 

 according to Dixon (p. 86) and Wiglesworth (p. 53), but 

 it breeds on all the islands. 



In the autumns of 1910 and 191 1 we found both adults 

 and birds of the year numerous throughout our visits. 



Larus glaucus, Glaucous Gull. — This species is, 

 no doubt, a regular winter visitor, arriving in late autumn 

 and departing in early spring. At present, however, we 

 only know of a single instance of its occurrence — namely, 

 in November 1886, when one was seen in the East Bay, 

 and recorded by the late Rev. H. A. Macpherson, Ibis 

 for 1887, p. 470, on the authority of Mr George 

 Murray. 



Since the above was written, Dr Wiglesworth tells me 



