A Question of Migration
10,000 Birds
MAY 19, 2011
Another question this raises has to do with migration itself. Annals of the New York Academy of Sciences, 1046 (1), 282-293 DOI: 10.1196/annals.1343.026 Those two questions are not mutually exclusive. Why migrate? In the words of the famous bird migration expert, Thomas Alerstam, birds migrate because the earth is tilted. 2 PIERSMA, T.,
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