226 STUDIES IN BIRD-MIGRATION 



*Dafila xcmtk, Pintail. — An immature male was 

 found on 14th September in a small piece of marshy 

 ground formed by the waters of the burn ere it 

 enters the sea at the East Bay. Another was seen 

 in the same place on 7th October 191 1. 



* Mareca PENELOPE, Wigeoti. — An adult male was 

 found on a pool near the summit of Mullach Sgail on 

 24th September 191 1 ; and a female was observed on 

 the Glen burn on loth October. 



* Nettion crecca, Teal. — On 13th September a male 

 was on the East Bay, and was afterwards seen feeding 

 in a marshy corner of the crofts. On the 21st, another, 

 or perhaps the same bird, rose from the burn which runs 

 past the village on the west. This species is new to 

 the St Kildan avifauna. 



In 191 1 single birds were seen on 13th September 

 and 2nd October, and two were seen in the bay on 

 30th September. 



* Harelda glacialis, Long-tailed Duck. — Three, 

 an adult male and two females or immature birds, 

 arrived on 7th October 191 1 and spent a little time 

 in the bay. It was observed that they did not seem 

 to appreciate the company of the numerous Cormorants 

 and Shags, and they were restless in consequence and 

 did not remain long. 



Somateria mollissima. Eider Duck. — The Eider 

 Duck would appear not to have been a breeding species 

 in the Rev. Neil Mackenzie's day (1829- 1843), for he 

 describes it (p. 76) as being occasionally seen in late 

 autumn. Mr Mackenzie, in 1841, made the same 

 statement to Wilson (ii., p. 80), who, on his authority, 

 relates that it now and then visits the shores in 

 October. Milner (p. 2061), however, includes it among 



