A pair of trumpeter swans (Cygnus buccinator) take flight against a backdrop of trees, some of which are still showing autumn color, in the Skagit Valley of Washington state. Most of the swans breed in the northern reaches of Canada and Alaska, and a large population winters in northern Washington state. Trumpeter Swans average more than 5 feet (152 cm) in length and can weigh up to 30 pounds (13 kg), making them the longest and heaviest living bird native to North America.
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