Underwater Flyers.

The emperor penguin lives in the coldest and windiest spot on earth: Antarctica. It spends the winter on the open ice, enduring temperatures of a hundred degrees below zero.

Penguins make their nests in groups, called rookeries. As many as a million penguins may gather in such a community, huddling together to conserve precious body heat.

Most birds use their wings to sail through the treetops. But the emperor penguin uses flippers to cruise through the water.

Its flipper's and webbed feet make the emperor penguin well-suited for swimming and diving--not flying. It can dive nearly 1,000 feet underwater to hunt for fish and can stay underwater for up to twenty minutes. And, when chased, emperor penguins can jump seven feet out of the water--a good way to avoid becoming a hungry leopard seal's lunch.

At four feet tall and one hundred pounds, emperor penguins are the largest of all the eighteen species of penguins, and, with orange stripes along their beaks and yellow and orange shading around their necks and chests, one of the most colorful.

Penguins can speed through the water at up to five miles per hour. On land, their short legs allow them to waddle at only about one-half mile per hour. To move more quickly across frozen land, penguins slide across the ice on their stomachs.

These amazing birds may not rule the sky, but they earn the title "emperor" just swimmingly in the water.

The emperor penguin doesn't need a toboggan! It scoots across the ice on its belly, using its small but powerful legs and feet to push itself along.