A genus of swimming birds included in the Auk family. Penguins exist in large numbers in the Antarctic seas, and along the southern coasts of Africa and South America.

Their front wings, which are without true quills, are too short for flight, and are used as fins or paddles in swimming under water. On shore these birds present a singular appearance, standing erect in long regular lines, resembling files of soldiers. The plumage of the neck is valued for collars and tippets, and large numbers are slaughtered annually.