Penguins can swim at speeds of more than 25 miles per hour. The birds use their wings as swimmers use their arms in a crawl stroke, and they steer with their feet. Their streamlined bodies glide through the water easily. Their thick coat of feathers provides a smooth surface that is impenetrable to water. Of all birds, they are the most fully adapted to water. The penguins, however, became master swimmers and divers. In theĬourse of evolution, its wings became small and stiff and lost their long feathers. Thus it came to spend all of its time on land or in the water. The bird has lived forĪges in or near the Antarctic regions, where it has few enemies. Now its wings are short, paddle-like flippers that are entirely useless for flight. Penguin ancestors could fly as well as any other sea bird.
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