194 BIRDS OF THE HUMBER DISTRICT. 



pairs formerly nested on the Farn Islands ; but it is 

 now quite extinct in that locality. 



Eggs of the Roseate Tern taken on the Farn Islands 

 are in the Berwick Museum. There are also authen- 

 ticated eggs and a nestling at Twizell House, near 

 Belford (Mr. Selby's). 



251. STERNA FLUVIATILIS, Naumann. Common 



Tern. 



Provincial. Sea-Swallow, Tarrock, Sparling. 



Less frequent than formerly, and not nearly so 

 Common as its name would imply. Arrives off the 

 coast about the last week in April or early in May. 



I have sometimes, in very stormy weather, met with 

 them in large flocks within the Humber early in the 

 autumn, in September ; but their presence within our 

 river, except on these special occasions, is quite ex- 

 ceptional. 



Formerly nested in some numbers on the Lincoln- 

 shire coast, where a few pairs still annually breed, but 

 very few compared with what I am told was the case 

 thirty or forty years since. 



The Common Tern nests also annually on the 

 Farns, on the same islands and in society with the 

 more numerous Arctic Tern. 



252. STERNA HIRUNDO, Linnaeus. Arctic Tern. 

 This is by far the most numerous of the Terns 



visiting, our coast. It is closely allied to the so- 



