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Birds in Flight

Birds in Flight
by W. P. Pycraft

Publisher: Gay & Hancock ltd. 1922
ISBN/ASIN: B002WTZR14
Number of pages: 220

Description:
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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