Photo of African Penguins looking out over the Atlantic Ocean at Table Mountain National Park - Boulders, near Capetown, South Africa.

Penguin
Excerpt from Wikipedia, the free encyclopedia

Penguins are superbly adapted to an aquatic life. Their wings have become flippers, useless for flight in the air. In the water, however, penguins are astonishingly agile. Within the smooth plumage a layer of air is preserved, ensuring buoyancy. The air layer also helps insulate the birds in cold waters. On land, penguins use their tails and wings to maintain balance for their upright stance.

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Ref: 2007_0581