72 FAUNA OF NORTH WALES 



226. — HERRING GULL. Larus argentatus argentaiccs 

 Pontopp. 



Abundant on the coasts ; breeds on islands and coasts of Anglesey and 

 Carnarvon. 



227.— LESSER BLACK-BACKED GULL. Larus fusa^ 

 affinis Reinh. 



Fairly common on the coasts as a resident or partial migrant : few breeding 

 places. 



An adult was seen on Bardsey by Dr. Ticehurst in June, 19J3, 

 and another by Mr. Coward in June, 1905 : Mr. H. King saw a 

 pair on the Bird Rock, Nevin, in August, 1907 : there is no 

 evidence of the species breeding, however, in either locality. 

 Inland one was seen at Llangollen by Mr. Ruddy in January, 

 and two on 21st March, 1911. On 27th July, 1909, two were 

 seen and one shot near Coed way on the Montgomeryshire 

 border. 



228.— GREAT BLACK-BACKED GULL. Larus mariuiis. L. 



Fairly common in winter. One or two pairs nest here and there in the 

 west. 



In Anglesey Mr. H. King found two pairs nesting in 1908, 

 while in 1909 there were three birds but only one nest. He not-ed 

 two pairs nesting on Puffin Island in 1909 and 1910. Mr. Oldham 

 records at least four pairs nesting at Pen-y-parc, Bodorgan, in 

 June, 1915. In 1911 Mr. W. Glynne Edwards found two pairs 

 nesting on the Skerries. Pellets from Bodorgan examined by 

 Dr. R. Newstead in March, 1904, contained remains of whelks and 

 shore-crabs. In Carnarvonshire Mi-. King saw a pair at the Bird 

 Rock, Nevin, in August, 1907. The island in Uyn Llydaw, 

 mentioned as a heeding place by Peimant, was submerged by the 

 artificial deepening of the lake. 



229.— GLAUCOUS GULL. Larus Jiyperboreus Gunner. 



Rare winter visitor. 



An immature example was shot by ]\Ir. A. Hamilton at 

 Deganwy, 23rd February, 1911, and sent to Chester Museum. 



