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Bright/showy traits are usually considered "indirect benefits." What are the two hypotheses that could explain bright ornamental plumage?
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Bright/showy traits are usually considered "indirect benefits." What are the two hypotheses that could explain bright ornamental plumage?

User Singer
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The different colorations that birds have in their plumage are determined by a combination between the content of pigments (carotenes or melanins) that they possess and the particular microstructure of certain parts of the feathers.

User Sage Mitchell
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