BIRDS 73 



230.— ICELAND GULL. Larus leucopteru^ Faber. 



Rare winter visitor to the Dee and Dovey estuaries. 



Mr. T. A. Coward records in Vert. Fauyia of Cheshire. I., 433, 

 an immature bird obtained at Hoy lake, Cheshire, about 1872-3. 



231.— KITTIVVAKE. Rissa tridactyla tridactyla (L.). 



Common resident on the coasts ; breeds in Anglesey and Carnjirvonshire. 



Dr. N. F. Ticehurst noted numbers off Bardsey 15-2Ist June, 

 1913, but none breeding there. 



231a. — GREAT SKUA. Stercorarius skua skua (Briinn.). 



Rare visitor to the coasts. 



Professor C. J. Patten records in the Zoologist, 1904, 75, having 

 a splendid viev/ of a Great Skua off Holyhead on 20th July, 

 1903. The Skua was in hot pursuit of a Lesser Black-backed 

 Gull. In the autumn of that year a Great Skua — ^possibly 

 the same bird — was taken on a baited hook in Douglas Bay, 

 Isle of Man. Mr. R. W. Jones saw a Great Skua on the Conway 

 estuary, 25th August, 1912 {Jirit. Birds, VI., 163), and two off 

 the Great Orme's Head, 2l8t September, 1915. He feels sure it 

 occurs more frequently than is supposed (Brit. Birds, IX., 127). 



232.— POMATORHINE SKUA. Stercorarins pomarinus 

 (Temm). 



Occasional visitor to the coasts in spring and autumn. 



233 —ARCTIC, or RICHARDSON'S SKUA. Stercorarius 

 parasiticus (L.). 



Occasional visitor, chiefly to the western coast and estuaries. 



The Migration Report mentions one seen flying south over 

 Trearddwr Bay, Anglesey, 29th August, 1911. Mr. R. W. 

 Jones saw one harrying Lesser Terns on Conway Estuary, 

 11th May, 1912 ; while in Merioneth Dr. Jackson observed 

 one at Aberdovey during the third week of July, 1908, and Mr. 

 H. G. Attlee watched another harrying Common Terns off 

 Llaiiaber, 15th July, 1913. 



