Wing of an Eagle
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“The more angular the wing of birds - that is to say, the longer the feathers on the edge of the wing - the more rapidly does it propel itself through the air.”
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Bird AnatomySource
Hazlitt Alva Cuppy PH.D., Editor Beauties and Wonders of Land and Sea (Springfield, OH: Mast, Crowell & Kirkpatrick, 1895)
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