How one naughty chicken cheats with fancy feather buildings

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Enlarge / A Brazilian Tanager (Ramphocelus bresilius) together with his dishonest crimson feathers wanting up on the sky. Rogerio Peccioli | Getty Feminine tanager birds dig flamboyant males. So to construct plumage that actually pops with orange or crimson or yellow, a male has to eat fruits and take up their carotenoids. The flowery feathers …
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