448 Major W. R. Thompson nn the [This, 



Larus marinus. The Greater Black-backed Gull. 

 A resident, breeding here. 



Larus fuscus affinis. The British Lesser Black-backed 

 Gull. 



A common resident, breeding here, though less numerous 

 than the Herring-Gull. The llerrino-Gull and the Lesser 

 Black-backed Gull breed here in the same localities and in 

 some cases in the same colony, but it' one carefully observes 

 these birds whilst on their nests, it will be noticed that in 

 most cases the Herring-Gull chooses the bare rock or face 

 of a cliff, whilst the Black-backed Gull, although nesting- 

 close at hand, seems to prefer to place its nest amongst 

 grass and undergrowth, or on the soil. The Greater Black- 

 backed Gull is a solitary individual ; it does not nest in 

 colonies, and when possible seems to prefer a small isolated 

 rock to itself. 



Larus ridibundus. The Black-headed Gull. 

 A few may generally be met with in winter. 



Larus minutus. The Little Gull. 



This Gull is not uncommon during the winter months, 

 but it prefers to keep some distance from shore ayd so is 

 not often seen. It appears to be more numerous during 

 heavy gales. 



Rissa tridactyla. The Kittiwake. 



Some usually to be seen during winter, and I have noticed 

 one or two throughout the summer, but these are probably 

 non-breeding birds. 



Sterna hirundo. The Common Tern. 



Before the war this bird occurred as a bird of passage in 

 small numbers, but I did not see it either last year (1919) 

 or this spring, which is curious, seeing that a colony breed 

 near Guernsey. 



Sterna paradisea. The Arctic Tern. 



These birds were common in Longy Bay and off the coast 

 during the first week in September 1920. 



