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 strueture cf grasses, seaweed 
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. 
