Birds

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

More Questions from Birds
Which of these could be used to identify birds?
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What is the common name of the bird Ducula carola?
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What is the common name of the bird Eudyptes schlegeli?
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What is the common name of the bird Treron pembaensis?
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What are a group of secondary feathers located closest to the bird's body?
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What is the common name of the bird Tetraogallus caucasicus?
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What is the dorsal part of the bird between the base of the wings from the neck to the tail?
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What type of bird whose habitat is on the open ocean rather than in a coastal region or on inland bodies of water?
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