A Quantitative Study of the Nocturnal Migration of Birds
by George H. Lowery
Publisher: University of Kansas 1951
The nocturnal migration of birds is a phenomenon that long has intrigued zoologists the world over. Yet, despite this universal interest, most of the fundamental aspects of the problem remain shrouded in uncertainty and conjecture.
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The wings of the bird not only lift the body from the earth, but they sustain it in the air by their marvellously complex movements. And this is true, in varying degrees of bird, and bat, and butterfly: of dragon-fly and beetle ...
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