Page:Natural History, Birds.djvu/214

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WOODPECKERS.
201

flight," observes Mr. Yarrell, "sufficient to transport the bird from tree to tree, are all that it

Great Spotted Woodpecker
Great Spotted Woodpecker

GREAT SPOTTED WOODPECKER.

seems to require: large pectoral muscles, with a deep keel to the breast-bone, would to this bird be an inconvenience. The advantage of a narrow, shallow keel is immediately apparent, on looking