Cygnus columbianus bewickii
Tundra Swans: Bewick’s and Whistling Subspecies
David Coultham
Species Guide: Tundra Swan (Cygnus columbianus)Family: Anatidae The Tundra Swan is a northern swan species divided into two primary subspecies ...
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Tundra Swans: Bewick’s and Whistling Subspecies
