a. k. a. Tundra Swan
Olor columbianus columbianus
A Whistling Swan in the Seattle Zoo, where it was labeled Tundra Swan
This swan is the Nearctic race of the Whistling Swan, Olor columbianus. It overlaps in range somewhat with the Trumpeter Swan, but it is smaller and has a concave line to the top of the beak as opposed to the straight surface of the Trumpeter's beak.
It is a solitary breeder that requires a large territory. Nests are close to the water and may even be found on beaver lodges. Whistling Swans feed mostly on submerged vegetation.
It can have a seven foot wingspan and weigh as much as 21 pounds.
Another shot of that Whistling Swan
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