National Geographic Society

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Adult brown pelicans make at least four feeding trips every day.  Their killing zone is close to shore.  It hits the sea with such force that fish are stunned six feet below the surface.  To survive the high-speed crash, the pelican has air-sacs under its skin: built in bubble-wrap to absorb the shock.  High diving helps pelicans catch fish beyond the reach of birds on the surface.

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Human daredevils are addicted to adrenaline: the greater the risk - the bigger the rush. But some animals put their lives on the line every day; not for fun -- but survival. We're counting down the ultimate top ten animal adrenaline junkies to find who takes the biggest risks, leaving bodies bent, broken, or dead. From free-wheeling salamanders to BASE jumping barnacle geese; buckle up - it's going to be a wild ride on the Ultimate Animal Countdown.