. The structure and life of birds. Birds; Evolution. FORM AND FUNCTION 165 various intermediate stages before we arrive at separate- toed feet. In the Dabchick and the other Grebes, the toes are not connected, but there is on either side of each a broad expansion of skin. In the Kingfisher the second, third, and fourth toes are fastened together. Fig. 43. Foot of (i), Woodpecker ; (2), Grebe, for most of their extent. The Woodpeckers, Cuckoos, and Toucans have a most curious form of foot called zygodactylc or yoke-toed, the first and fourth toes pointing backward, the other two forward—a foot

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. The structure and life of birds. Birds; Evolution. FORM AND FUNCTION 165 various intermediate stages before we arrive at separate- toed feet. In the Dabchick and the other Grebes, the toes are not connected, but there is on either side of each a broad expansion of skin. In the Kingfisher the second, third, and fourth toes are fastened together. Fig. 43. Foot of (i), Woodpecker ; (2), Grebe, for most of their extent. The Woodpeckers, Cuckoos, and Toucans have a most curious form of foot called zygodactylc or yoke-toed, the first and fourth toes pointing backward, the other two forward—a foot specially adapted for climbing. In the Swift all the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Headley, F. W. (Frederick Webb), 1856-1919. London, New York, Macmillan

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