Nazca bobby. These were long considered a subspecies of the masked booby until recognized as distinct genetically and behaviorally in 2002. The female is bigger and heavier than the male, has a slightly differently colored beak, and squawks while the male whistles. Chicks are snow white and fluffy, plumage changing to grey along with beak and feet as they grow. The Nazca booby preys on small fish caught by diving at high speed from flight into the ocean

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