whistling swan

the small North American subspecies, Cygnus columbianus columbianus, of the tundra swan.


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World English Dictionary
whistling swan
Compare mute swan a white North American swan, Cygnus columbianus, with a black bill and straight neck

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
Satellite tracking of the migration routes of whistling swan.
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