Penguins are a group of aquatic, flightless birds
living almost exclusively in the southern hemisphere,
especially in Antarctica. Highly adapted for life
in the water, penguins have countershaded dark and
white plumage, and their wings have become flippers.
Most penguins feed on krill, fish, squid, and other
forms of sealife caught while swimming underwater.
They spend about half of their lives on land and
half in the oceans...