The Feather Followers
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By sharing their observations, birdwatchers can help scientists understand where the various species of birds are throughout the year.
观鸟者通过共享其观测记录，可助力科学家掌握各类鸟类在全年的分布状况。
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2011-08-08
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By sharing their observations, birdwatchers can help scientists understand where the various species of birds are throughout the year.
观鸟者通过共享其观测记录，可助力科学家掌握各类鸟类在全年的分布状况。