( 214 ) 

 THE BIRDS OF BARDSEY ISLAND. 



BY 



N. F. TICEHURST, m.a., m.b.o.u., etc. 

 [Concluded from p. 193.) 

 PART 6. 

 The Great Black-backed Gull {Larus marinus). 



One breeding pair recorded by Mr. Aplin , and a bird or birds 

 seen by Mr. Coward. 



In June 1913 one or a pair of adults and an immature bird 

 were always present amongst the Herring-Gulls in the east 

 bay. These may have had their nest robbed or lost their 

 young. There was also a nesting pair amongst the Herring- 

 Gulls at the northern end of the island, and a second pair 

 about half way along the east side. The latter could always 

 be seen from the mountain top, but in neither case could I 

 reach the nesting place, owing to the steep and slippery grass 

 slopes. 



In September one or both of a pair of adult birds was 

 present in or near the east bay almost every day. They were 

 the only ones seen. 



The Kittiwake [Rissa t. tridactyla). 



Not recorded by Mr. Aplin or by Mr. Coward. 



From June iSth to the 21st, 1913, a large flock haunted the 

 reef off the west bay ; they moved for a time to the southern 

 point of the island on the afternoon of the 15th, and here they 

 could be examined at fairly close range. In September, single 

 birds were seen on the 15th, i8th and 21st ; while there was a 

 good-sized flock off the southern point on the 17th. 



The Razorbill {Alca tor da). 



In May 1901 Mr. Aplin only saw two or three birds at the 

 foot of the eastern cliffs. In June 1905 Mr. Coward computed 

 the breeding population at, at least, twenty pairs, and judging 

 by what little I could see in 1913 from the landward side, I 

 should say that was about the number present in the latter 

 year. They seemed to be scattered in isolated pairs amongst 

 the Herring- Gulls, but none were breeding at any place that 

 could be reached with a reasonable regard for safety. 



In September a single bird was seen on the 19th. 



The Common Guillemot [Uria t. troille). 



In May 1901 Mr. Aplin saw about a score on the sea beneath 

 the eastern cliffs and suggested that the breeding place was 

 about the north-east corner. 



