LONG-TAILED JAEGER
38. Stercorarius longicaudus. 21 in.
Like the last species, but with the pointed central tail feathers projecting 8 or 10 in. and with a shorter bill (1.15 in.) and the nostril about midway of its length. It is less often found in the dark phase.
Notes.—Shrill wailing whistles.
Nest.—Nest and eggs like those of the [Pomarine Jaeger].
Range.—Arctic regions, wintering south to Florida.
GULLS AND TERNS—Family Laridæ
IVORY GULL
39. Pagophila alba. 17 in.
Entirely pure white with the shafts of the primaries yellowish; bill dark at base and yellow at tip; eyes brown, surrounded by a narrow red ring; feet black. Young birds are spotted with brown on the head, tips of wing and tail. This beautiful “Snow Gull,” as it is called by whalers, is abundant at its breeding ground in the Arctic regions, but is rarely seen as far south as the United States. It breeds the farthest north of any of the gulls except [Ross Gull].
Nest.—Of grasses and seaweed, usually on ledges of cliffs, but occasionally on the ground farther inland. The three eggs, laid in June, are grayish-buff, marked with brown and black (2.30 × 1.70).
Range.—Breeds only north of the Arctic Circle, and winters south to New Brunswick and British Columbia; casually to Long Island and the Great Lakes.
