http://www.birdsource.org

Welcome to BirdSource
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BirdSource, a partnership of The Cornell Lab of Ornithology and the National Audubon Society offers insight into the dynamics of North American Bird populations with projects that track migration, irruption, and foraging behavior.tch Participate in Project FeederWatch during the winter 2010-2011 season! eBird BirdSource Project...
[教育、培訓] - www.birds*urce.org - ISO-8859-1 - 2012-05-13

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