The largest and best-known colony on the British coasts is at the Farne Islands, and of that colony Seebohm writes: ‘It is a wonderful sight on approaching an island to see the green mass sprinkled all over with large white-looking birds, every one standing head to wind, like an innumerable army of white weathercocks.’ It is also fine to see and hear them, when a person walks about among the nests, stooping occasionally to examine eggs or handle the yellow, black-spotted chicks: the birds hover in a dense cloud over his head, their deep, powerful cries mingling in one mighty uproar, and, at short intervals, one or two birds dash down out of the bird-cloud as if to strike his head, and, missing it by an inch or two, reascend to repeat the action. Common Gull. Larus canus. Bill greenish at the base, yellow at the tip; legs and feet greenish yellow; mantle ash-grey; first two primaries black, with a white patch near the extremity; the rest black near the end; head, neck, tail, and under parts white. Length, eighteen and a half inches. * * * * * The name of this species is somewhat misleading, as it is less numerous on most of our coasts, and in estuaries and rivers, than the black-headed species, which indeed is often called the common gull. When flying about in company, the two species are indistinguishable in the winter plumage. The common gull has no breeding-place south of the Border. In Scotland and its islands there are several colonies, and in Ireland a few. In its habits it is intermediate between the marine and inland species, and its gulleries are placed both on islands near the sea-coast and in lochs at a distance from the shore. Like the herring-gull and black-headed gull, it follows the plough to pick up worms and grubs, and roams over moors, marshes, and pasture-lands in search of insects, small vertebrates, and carrion. The nest is bulky, and composed of seaweed, herbage, and dry grass. Three eggs are laid, olive-brown, spotted and streaked with blackish. Great Black-backed Gull. Larus marinus. Bill yellow; legs and feet flesh-colour; plumage as in the lesser black-backed gull. Length, thirty inches. * * * * * [Illustration: FIG. 110.--GREAT BLACK-BACKED GULL. ¹⁄₁₁ natural size.]