290 HANDBOOK OF BRITISH BIRDS 



Sterna arctica of Temminck, "Man. d'Orn." (1820), 

 vol. ii. p. 742. Like the last-named, it is a summer 

 visitor to the British Islands, arriving in May and 

 departing in September, and is the northern repre- 

 sentative of the commoner species found sporadi- 

 cally along the more southern portions of our 

 shores. In June 1881, Mr. Eagle Clarke found 

 both species breeding in countless numbers on the 

 Longstone, one of the Fame Islands. In Ireland 

 it breeds, in company with the Common Tern, 

 on the islets in Lough Carra, Co. Mayo (A. G. 

 More, ZooL, 1860, p. 6891), and there is usually 

 a large breeding colony of the Arctic Tern on Horse 

 Island, Brown's Bay, about twelve miles from Sligo; 

 also on Lough Mask, on an island off Cushlough 

 (Warren, Irish Nat, 1896, pp. 150-151). 



When near enough to be clearly distinguished, 

 it may be known from the Common Tern by its 

 shorter bill, which is wholly red, i.e. without a 

 black tip, and by its longer outer tail feathers, as 

 indicated by the specific name macrura. On closer 

 inspection it will be found to have shorter legs than 

 the common species. The young of both kinds 

 have the dorsal plumage mottled and barred with 

 buff; the bill yellow with a dark tip; the legs and 

 feet at first yellow, then orange-brown, finally red. 



ROSEATE TERN. Ster^ia dougalli, Montagu. Length, 

 15*5 in. ; bill, 1'9 in. ; wing, 9*25 in. ; tarsus, 0'85 in. 



A rare summer visitant. So named from the rosy 

 colour of the underparts in the breeding season, and 



