NORTH AMERICAN GULLS AND THEIR ALLIES. 
35 
Tomales Point, May 24, 1884 (specimens in U. S. National Museum). 
Eggs and young were found at Otter Rock, Oreg., June 29, 1899 
Fig. 16.— Western gull (Larus occidentalis), adult in summer plumage. 
(Prill), and on the islands near Lapush, Wash., June 21, 1897 (Young). 
The species winters commonly in Shoalwater Bay, Wash., and is not 
rare at this season north to 
Vancouver Island, British 
Columbia (Mayne). It also 
winters along the whole 
Pacific coast of the United 
States and Lower California 
and was abundant at the 
head of the Gulf of Califor- 
nia, November 25 to Decem- 
ber 15, 1898 (Price), and 
February and March, 1905 
(Stone). 
The species was taken 
once at Socorro Island, Mex- 
ico (Anthony), and once, 
September 30, 1889, at 
Loveland, Colo. (Osburn). 
[SIBERIAN GULL. 
Larus affinis Reinhardt. 
Though normally an inhabitant 
of the Eastern Hemisphere, the 
Siberian gull was originally de- 
Fig. 17.— Siberian gull (Larus affinis). 
scribed from a wanderer to Nenortalik, in the Julianehaab district of southwestern 
Greenland. This species breeds regularly in northern Russia and Siberia from the 
Dwina to the Yenesei, and winters south to western India and northern Africa.] 
