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Dr. Oz in the Galápagos Islands

Blue-Footed Booby

The blue-footed booby is an example of what happens when natural selection and sexual selection are pitted against each other. The male booby's blue feet make him more attractive to females, but the coloration has a downside—he is more noticeable as prey.

Photo Stephen K. Mack
Published on February 11, 2009
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