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16 September, 01:54

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

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  1. 16 September, 02:14
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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.
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