Researchers investigate bird's 'carotenoid circle of life'

(PhysOrg.com) -- “What you see is what you get” often is the mantra in the highly competitive life of birds, as they use brilliant displays of color to woo females for mating. Now researchers are finding that carotenoids - the compounds responsible for amping up red, orange and yellow colors of birds - also may play a role in color perception and in a bird`s ability to reproduce, making it a cornerstone in birds` vitality.

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