WHAT OTHER PHYSICAL FEATURE ARE COMMON TO BIRDS
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All birds have wings, although not all birds fly. ... Beak. All birds have beaks, or bills, made of a bony core surrounded by a thin layer of keratin. ... Skeleton
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All birds have wings, although not all birds fly. ... Beak. All birds have beaks, or bills, made of a bony core surrounded by a thin layer of keratin. ... Skeleton
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