Pinguoin

are world-famous as flightless, tuxedo-clad birds, they are actually highly specialized marine hunters. Most of the 18 to 21 species live in temperate coastal waters rather than the deep Antarctic. Key Biological Features

: Both parents usually take turns guarding the nest and foraging for fish, krill, or squid. Pinguoin

: Instead of wings for flight, penguins have stiff, scale-like flippers used for "flying" underwater. are world-famous as flightless, tuxedo-clad birds, they are

: The Emperor penguin can dive to depths of 550 meters (1,800 feet), the deepest of any bird. are world-famous as flightless