Which of the following is INCORRECTLY spelled.

The word Pengun is incorrectly spelled. The correct spelling is Penguin.

Here are the words and their correct spellings:

• Penguin is a flightless bird that lives in the Southern Hemisphere.
• Kiwi is a flightless bird that lives in New Zealand.
• Elephant is a large, gray mammal with a long trunk.
• Buffalo is a large, hoofed mammal with curved horns.