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trumpeter swan |
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trumpeter swanBlack-billed species (Cygnus cygnus buccinator) of swan, named for its far-carrying, low-pitched call. About 6 ft (1.8 m) long, with a 10-ft (3-m) wingspan, it is the largest swan, though it weighs less than the mute swan. Once threatened with extinction (fewer than 100 were counted in the U.S. in 1935), it has made a strong comeback; though still listed as vulnerable, its population in western Canada and the northwestern U.S. now exceeds 5,000. |
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Since 1999, more than 2,100 trumpeter swans in northwest Washington and southwest British Columbia have died--about 15 percent of the birds that winter in this region. Another entertaining section features "incredible" birds that are extreme in some way: the tallest and heaviest trumpeter swans, best dancer cranes, most talkative magpies, and the least-likely-to-succeed eagles, among many others. An interesting problem faces conservationists who wish to reintroduce trumpeter swans to the eastern United States: since the birds must learn migration routes from their parents, and the last birds in the area died out two hundred years ago, no birds remain to remember the routes. |
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