Interspecific variation in dietary carotenoid assimilation in birds: links to phylogeny and color ornamentation.

Abstract excerpt

Many birds use carotenoid pigments to acquire rich red, orange, and yellow coloration in feathers and bare parts that is used as a signal of mate quality. Because carotenoids are derived from foods, much attention has been paid to the role of diet in generating color variation both within and among avian species. Less consideration has been given to physiological underpinnings of color variability, especially...

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