66 



BULLETIN 292, U. S. DEPARTMENT OF AGRICULTURE. 



Murdoch, Seale, and Mcllhenny found it common in migration. It 

 breeds commonly at the mouth of the Yukon and on the shores of 

 Norton Sound and south along the Alaska coast to the mouth of the 

 Kuskokwim (Nelson). 



Winter range. — The only place where Sabine's gull has been found 

 in winter is on the coast of Peru. Here it is common in Callao Bay 

 from December (Markham) to April (Macf arlane) . It was also taken 



BREEDING 



OCCURRENCE IN SUMMER 



Fig. 31.— Sabine's gull (Xema saUni). 



at Tumbcz, on the extreme northern coast of Peru, in September, 1872 

 (Steere). Except as single birds have been found wandering far 

 inland, the record for Callao Bay is the only known occurrence of the 

 species for half the year, from October to April. Whenever the 

 winter home of Ross's gull is discovered Sabine's gull will probably 

 be found there also, for the two species arrived together at (lie mouth 

 of the Kolyma River, Siberia, the first of June, 1905 (Buturlin), 

 and were together when seen in migration in May several hundred 

 miles west of that district (Buturlin). 



