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Discribing a bird on an animal's. |
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Answer» Answer: Bird, (CLASS Aves), any of the more than 10,400 living species unique in having feathers, the major characteristic that DISTINGUISHES them from all other animals. A more-elaborate definition would NOTE that they are warm-blooded vertebrates more RELATED to reptiles than to MAMMALS and that they have a four-chambered heart (as do |
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