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Birds
are bipedal, warm-blooded, egg-laying vertebrates characterized primarily by feathers, forelimbs modified as wings, and hollow bones.
are a major group of organisms, classified as the kingdom Animalia or Metazoa.
(From Wikipedia, the free encyclopedia.)
are bipedal, warm-blooded, egg-laying vertebrates characterized primarily by feathers, forelimbs modified as wings, and hollow bones.
are a major group of organisms, classified as the kingdom Animalia or Metazoa.
