What physical feature is common only to birds
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Answer:
THEY CAN FLY AS THEY HAVE STREAMLINED AND HOLLOW BODIES
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Answer:
Like mammals, birds are warm-blooded – their temperature always stays the same , even if it is cold outside. Bird don't have teeth , they have a hard beak that they use to get food or defend themselves. A bird has a light but strong skeleton and bones that are hollow. Many of them are joined together.
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