The sparrows are perchers, grain-eaters, free-fliers, and singers; and they, of all birds, are the friends and neighbors of man. [Please select]
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All birds by no means possess this particular muscle, but all the perchers have some muscular arrangement in the legs and toes that practically answers the same purpose. [Please select]
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Quite a number of species have only three toes, most of them among the walkers and waders, and none, I believe, among the true perchers. [Please select]
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