THE BIRD BOOK 
'V'' 
V' 
40a. Pacific Kittiwake. Rissa tridac- 
tyla pollicaris. 
Range. — Coast of the North Pacific, wintering 
south to California. 
The Pacific Kittiwake breeds in immense rook- 
eries on some of the islands in Bering Sea. They 
are well distributed over Copper Island where 
they nest in June and July, choosing the high 
ledges which overhang the sea. The nesting 
habits and eggs are precisely the same as those 
of the common Kittiwake. 
11. Red-legged Kittiwake. Rissa brcvi- 
rostris. 
Range. — Northwestern coasts, breeding in high 
latitudes. • 
This Kittiwake is similar to the preceding, with 
the exception that the legs are bright red, the 
mantle is darker, and the bill is shorter. This 
species was found by Dr. Leonard Stejneger to be 
a very abundant nesting bird on islands in Ber- 
Brownish buff 
ing Sea, selecting steep and inaccessible rocks and ledges on which to build 
its nest. Their nesting habits are precisely the same as the Pacific Kittiwake, 
but they most often nest in separate colonies, but can be distinguished readily 
when nesting together by the darker mantles when on the nest and the red 
legs when flying. Grass, moss and mud are used in the nest. The ground color 
of the eggs is buffy or brownish, and the spots are dark brown and lilac. 
Size 2.15 x 1.50. 
42. Glaucous Gull. Laras hyperboreus. 
Range. — Arctic regions, south in winter to Long Island, the Great Lakes, and 
San Francisco Bay. 
This Gull shares with the Great Black-backed Gull the honor of being 
the largest of the Gulls, being 28 inches in length. Mantle light gray; it is 
distinguished by its size and the primaries, which are white to the tips. A 
powerful zird that preys upon the smaller Gulls and also devours the young 
and eggs of smaller birds. 
They nest on the ground on the islands and shores of Hudson Bay, Green- 
land, etc. The nest is made of seaweed, grass and moss and is generally quite 
bulky. The two or three eggs are laid in June. They are of various shades of 
color from a light drab to a brownish, and are spotted with brownish and 
black. Size about 3 x 2.20. 
Ued-leg-gecl Kittiwake 
Glaucous Gull 
40 
