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The great egret (Ardea alba), also known as the common egret, large egret, or great white egret is a large, widely distributed egret with four subspecies found in Asia, Africa, the Americas, and southern Europe. Distributed across most of the tropical and warmer temperate regions of the world, it builds tree nests in colonies close to water.
Gulls range in size from the little gull, at 120 g (4.2 oz) and 29 cm (11 in), to the great black-backed gull, at 1.75 kg (3.9 lb) and 76 cm (30 in). They are generally uniform in shape, with heavy bodies, long wings, and moderately long necks. The tails of all but three species are rounded; the exceptions being Sabine’s gull and swallow-tailed gulls, which have forked tails, and Ross’s gull, which has a wedge-shaped tail. Gulls have moderately long legs, especially when compared to the similar terns, with fully webbed feet. The bill is generally heavy and slightly hooked, with the larger species having stouter bills than the smaller species. The bill colour is often yellow with a red spot for the larger white-headed species and red, dark red or black in the smaller species.
