king penguin

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A large penguin (Aptenodytes patagonicus) of subantarctic regions, having an orange oval on the side of the face and a yellow patch at the base of the throat.

from The Century Dictionary.

• noun The great or Pennant's penguin, Aptenodytes pennanti or A. rex.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun a large penguin, Aptenodytes patagonicus, that lives on the coast of Antarctica and nearby islands

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun large penguin on islands bordering the Antarctic Circle