This Gull, which formerly was No. 51a, a subspecies of the European variety, is now regarded as identical with it, and is no longer a sub-species. It is twenty-four inches in length, has a light gray mantle and black primaries which are tipped with white. The Herring Gulls nest in colonies in favorable localities throughout their range, chiefly on the coasts and islands. A few pairs also nest on islands in some of the inland bodies of fresh water. Except in places where they are continually molested, when they will build in trees, they place their nests on the ground either making no nest on the bare sand, or building a bulky nest of seaweed in the grass on higher parts of the island. They lay three eggs of a grayish color marked with brown. In rare cases unspotted bluish white eggs are found. Size 2.80 × 1.70. [Illustration 046: Western Gull. Herring Gull.] [Illustration: Buff.] [Illustration: left hand margin.] Page 45 52. VEGA GULL. _Larus vegae._ Range.--Coast of Alaska, south in winter to California. Similar to the Herring Gull, but with the mantle darker, but not so dark as in the Western Gull. The nesting habits and eggs are the same as those of the Herring Gull, except that in a series, the eggs of the Vega will average a little darker in ground color. It nests during May on the coasts and islands of Bering Sea, placing its eggs in a hollow on the ground. Size 2.75 × 1.65. 53. CALIFORNIA GULL. _Larus californicus._ Range.--Western North America, breeding in the interior. A smaller Gull than the Herring with the primaries grayish instead of black; length twenty-five inches. This Gull is found in winter on the coast from British Columbia southward to Lower California, but nests in the interior from Utah northward. They nest very abundantly around the Great Salt Lake, placing their nests generally upon the bare ground. Sometimes there is a scant lining of grasses or weeds and again the nests will be situated in the midst of a tussock of grass. Three or four eggs generally constitute a set, but occasionally five are laid. The usual nesting time is during May. They show the same great variations in color and markings common to most of the Gulls. Size 2.60 × 1.80. 54. RING-BILLED GULL. _Larus delawarenis._ Range.--Whole of North America, breeding from the United States northward and wintering south to the Gulf States.