290 gavijE. 



285. LARUS GLAUCUS. 



(GLAUCOUS GULL.) 



Larus fflaucus, Briinnich, Orn. Bor. p. 44 (1764). 



The Glaucous Gull is the largest species of the genus (wing from 

 carpal joint 21 to 18 inches). Its legs are flesh-coloured, its orbits 

 vermilion (in the adult), and its primaries white. 



Figures : Gould, Birds of Great Britain, v. pi. 57 ; Dresser, Birds 

 of Europe, viii. pi. 605 (legs and feet wrongly coloured). 



The Glaucous Gull is a winter visitor to Japan ; immature examples 

 are more common than adults, but the latter are occasionally met 

 with. There is an example in the Swinhoe collection from Hakodadi 

 (Swinhoe, Ibis, 1874, p. 165), which was apparently the first obtained 

 in Japan ; and there is another in the Pryer collection from Yoko- 

 hama. 



The Glaucous Gull is a circumpolar species, and is a winter visitor 

 to the British Islands. 



286. LARUS GLAUCESCENS. 

 (GLAUCOUS-WINGED GULL.) 



Larus glawxscens, Naumanu, Naturg. Viig. Deutschl. x. p. 351 (1840). 



The Glaucous-winged Gull is quite as large as a Herring-Gull, and 

 resembles that species in the colour of its mantle. It may at once 

 be recognized by its primaries, the pattern of which resembles that of 

 L. cachinnans, but the dark part of the markings, instead of being 

 nearly black, are lavender-grey like the mantle. 



The Glaucous-winged Gull is an occasional visitor to Japan from 

 the American coast, where it breeds in Alaska and winters in Cali- 

 fornia. Examples from Hakodadi are in the Swinhoe collection, 

 which appear to be the first obtained in Japan, and in that of 

 Mr. Howard Saunders (Swinhoe, Ibis, 1874, p. 165). It has also 

 occurred in Tokio Bay (Blakiston and Pryer, Trans. As. Soc. Japan, 

 1882, p. 104). 



The Glaucous-winged Gull is a Pacific-Ocean species, breeding on 

 the Commander Islands and in Alaska. 



