Selasa, 07 Agustus 2012


The Biggest Animals Kingdom and in The World | Swan | Swans are the largest members of the family Anatidae and waterfowl are among the largest flying birds. The largest species, including mute swan, trumpeter swan, whooper swan and reach a length of about 1.5 m (60 inches) and weigh over 15 kg (33 pounds). Compared with the closely related geese are larger and have proportionately larger legs and neck. Northern Hemisphere species of swan have pure white plumage but the Southern Hemisphere species are black and white mix. Australian Black Swan (Cygnus atratus) is completely black except for white feathers on its wings, black swans pups are gray in color, and South America black necked Swan has a black throat.

The legs of swans are usually a dark gray-blackish, except for two species of South American pink legs. Bill color varies: four subarctic species have yellow black bills with varying amounts, and all are patterned red and black. Silent and black swan necked Swan have a lump in the draft law on the upper beak Swans are usually found in temperate environments often occur in the tropics. A group of swans is called a wedge or a flock in flight.

A species, swan, was introduced in North America, Australia and New Zealand. Many species are migratory birds, either in whole or in part, so wise. Swan is a partial migrant, residing in areas of Western Europe, but the whole migration pressures in Eastern Europe and Asia. Swan Tundra Swan are all wild and migratory birds, and Trumpeter swans are migratory birds almost exclusively.

Unlike many ducks and geese, the male helps to build their nests. Average egg size (the swan) is 113 × 74 mm, weighing 340 g, up to a size 4-7 clutch, and an incubation period of 34-45 days, except duck whistles they are only where men help ducks incubating eggs. Swans are known to aggressively protect their nests.

Swan is obviously in the southern hemisphere Cygnus (Del Hoyo et al. EDS, Handbook of birds of the World), closest to his habits bent on wearing neck fluffed (not directly) and wings (not color) and that bill color and knob indicate that the closest living relative of the black swan.

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