黑嘴天鵝 凱利溫泉中的黑嘴天鵝 小號(hào)天鵝原產(chǎn)于北美，居住在美國(guó)北部和西部48個(gè)州以及加拿大和阿拉斯加的河流，湖泊和沿海小路附近。 根據(jù)它們的居住地，這些天鵝是常駐鳥類還是中距離遷徙者。 不過，他們都需要在冬季開闊水域，因?yàn)樗鼈兊娘嬍硯缀跞渴撬参铩?這也許就是為什么這張照片中的天鵝被懷俄明州的凱利暖泉水吸引的原因，即使雪在河岸邊也不會(huì)凍結(jié)。

黑嘴天鵝是北美最大的水禽生物。 已知最大的雄天鵝，體重近40磅，翼展為10英尺。 盡管在20世紀(jì)初期，它們?yōu)l臨滅絕，但如今估計(jì)有35,000只幼鵝。 即使有了很大規(guī)模的恢復(fù)，狩獵它們?nèi)匀皇欠欠ǖ摹?是的，他們的聲音聽起來確實(shí)像喇叭，但Miles Davis卻不是。?

原文:

Native to North America, trumpeter swans live near rivers, lakes, and coastal byways in northern and western US states in the lower 48, as well as in Canada and Alaska. Depending on where they live, these swans are either resident birds or medium-range migrators. What they all require, though, is open water during winter, since their diet consists almost entirely of aquatic plants. That may be why the swans in this image are drawn to the waters of Kelly Warm Springs in Wyoming, which won't freeze even as snow lines the banks.trumpeters are the largest living species of waterfowl in North America. The biggest known cob—that's a male swan--weighed almost 40 pounds and had a wingspan of 10 feet. Although in the early 20th century they came perilously close to extinction, today there's an estimated 35,000 trumpeters. Even with the tremendous recovery, it remains illegal to hunt them. And yes, their calls do sound like trumpets, but Miles Davis they aren't. Click below to listen.

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