SULE SKERRY AND ITS BIRD-VISITORS 297 



Branta leucopsis, Bernacle - Goose. — Has been 

 occasionally observed moving north at the end of April, 

 and southwards after the middle of October. 



Tadorna casarca, Ruddy Sheld-Duck. — An adult 

 female was obtained on i8th June 1909, and was 

 forwarded to me for identification. This is the first 

 known instance of a visit of this bird to any of the 

 northern isles. 



Anas boscas, Mallard. — Is an occasional visitor, 

 usually in pairs, during the winter months (Tomison). 



Nettion crecca, Teal. — Far from a common visitor, 

 according to Mr Tomison and the records. On 27th 

 February 1906, a male was shot and sent to me; two 

 appeared on 30th March 191 1 ; and one was observed 

 on 2 1st October 1908. 



Mareca PENELOPE, Wigeon. — A few visit the island 

 every year, according to Mr Tomison, but there are no 

 entries relating to this bird's appearance in the schedules. 



Fuligula fuligula. Tufted Duck. — There is one 

 known occurrence only — that of a male on 30th April 

 1902, whose wings were sent me for identification. 



Fuligula ferina. Pochard. — Two appeared on 13th 

 March 1903, and the wings of one of them were sent for 

 determination. 



Fuligula marila, Scaup. — There are three entries 

 in the schedules for the visits of this species. These 

 relate to the appearance of single birds in February, 

 August, and October. 



Harelda glacialis. Long-tailed Duck. — A young 

 male, shot on 19th October 1901, is the only known 

 appearance of this common winter visitor to our northern 

 seas. 



Somateria jvroLLissiMA, Eider Duck. — Resident, but 



