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Tuesday 3 June 2008 photo 364/633
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The Northern Hemisphere species of swan have pure white plumage but the Southern Hemisphere species are mixed black and white. The Australian Black Swan (Cygnus atratus) is completely black except for the white flight feathers on its wings, and the South American Black-necked Swan has a black neck.
The legs of swans are dark blackish grey, except for the two South American species, which have pink legs
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