The biology of birds. Birds. 126 THE BIOLOGY OF BIRDS membranes function as vocal cords. Their tension is regulated by muscles attached to the wall of the syrinx. A detailed account
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Animal biology; Human biology. Parts II & III of First course in biology. Biology. BIRDS I65. FIG. 307. — POSITION OF VOCAL CORDS (str) OF MAMMAL AND BIRD. Question: Does a
The structure and life of birds. Birds; Evolution. VI FORM AND FUNCTION 137 important respects, the same as that of the human larynx. There are two membranes corresponding to those called
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Syrinx (bird anatomy) - Wikipedia
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Bird communication
