Digestive adjustments in cedar waxwings
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McWilliams, Scott R.; Caviedes-Vidal, Enrique; Karasov, William H.
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Article
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1999
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John Wiley and Sons
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English
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Birds may dramatically increase their food intake during migratory periods or during winter. We tested the hypotheses that when birds are hyperphagic, (a) their digesta retention time and extraction efficiency will not change compared with that of birds feeding at reduced rates, (b) their total capa