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Invasive Species Contest 2012: Viewing a fullsize picture

"Mute swans, Cygnus olor. This species was introduced from Europe in the 19th century. In the Great Lakes region (and probably throughout the USA) it now predominates, having driven out the native trumpeter swans. They affect other native waterfowl as well as aquatic plants."

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By arctangent

Mute swans, Cygnus olor. This species was introduced from Europe in the 19th century. In the Great Lakes region (and probably throughout the USA) it now predominates, having driven out the native trumpeter swans. They affect other native waterfowl as well as aquatic plants.


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