Birds

What allows some birds such as chickens to digest hard materials such as seeds?

More Questions from Birds
What is the depression in which the bird’s nostril is located?
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What is a male turkey less than a year old called?
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What is the study of birds called?
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What is this bird that can mimick hawk calls?
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Which of these birds is extinct?
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What is the common name of the bird Geotrygon montana?
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What is the common name of the bird Streptoprocne rutila?
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In which biological class do birds belong?
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