GLAUCUS GULL 



42. Larus hyperboreus. 28 in. 



Plumage white with a pearl gray mantle; no black 

 in the plumage, the primaries being white or grayish ; 

 bill and eye yellow, the former with a red spot at the 

 end of the lower mandible; feet flesh color. In winter, 

 the head is slightly streaked with brownish. Young 

 birds are mottled grayish brown and white, of varying 

 shades, but always lighter than the young of the Her- 

 ring Gull. Some specimens are very beautiful, being 

 entirely white, with a few spots of brownish on the 

 back, resembling the markings of a light-colored Snowy 

 Owl. This species is one of the largest and most power- 

 ful of the gull family, only surpassed by the Great 

 Black-backed Gull. 



Nest. Usually a bulky structure cf grasses, seawi 

 and moss placed on the ground ; the two or three eggs are 

 brownish gray with brown and black spots ( 3. x 2.20 ) . 



Range. Breeds from Labrador and Hudson Bay 

 northward; winters south to New England, the Great 

 Lakes and Calif. 



