NORTH AMERICAN GULLS AND THEIR ALLIES. 



15 



the south end of Greenland, or that wanders to the eastern coast of 

 Canada. 



Spring migration. — The first ivory gull arrived at Winter Harbor, 

 May 24, 1820 (Parry), and on the northern coast of Prince Patrick 

 Island, June 12, 1853 (M'Clintock). One appeared at Peterman Fiord, 

 near the northeast point of Ellesmere Island, May 28, 1876 (Feilden). 

 It appears to be not rare in migration at Point Barrow, Alaska, where 



BREEDING 



OCCURRENCE IN SUMMER 



Fig. 5. — Ivory gull (Pagophila alba). 



it was noted May 22, 1882 (Murdoch), and June 2, 1898 (Stone). 

 Stragglers have been recorded from Godbout, Quebec, April, 1877, 

 and March 7, 1906 (Comeau), and Sandwich Bay, Labrador, June 12, 

 1897 (Dawson), while one of the few records for the Pribilof Islands, 

 Alaska, is that of a specimen taken on St. Paul Island in the early 

 spring of 1895 (Prentiss). 



The earliest eggs were found June 21, 1853, on Prince Patrick 

 Island (M'Clintock), and the nesting season is so extended that eggs 



