Birds

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

More Questions from Birds
What is the state bird and state tree of Minnesota?
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When do ducks usually lay their eggs?
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Which of these are large birds that nest on the ground?
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Which species best matches this description, "intelligent, talkative bird"?
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Murres, puffins and guillemots are all types of what seabird that has short wings?
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What is the common name of the bird Amazilia cyanocephala?
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What is the common name of the bird Columbina cyanopis?
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Which bird can fly backwards?
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