Multiple choice general knowledge What bird can't fly, but can run a speed of about 40 miles an hour? Cheetah Eagle Ostrich Rooster Reveal answer Fill a bubble to check yourself C Correct answer Explanation The ostrich is a flightless bird that can run at speeds up to 45 mph. Cheetahs are mammals (not birds) and are the fastest land animals, eagles can fly, and roosters are domestic fowl that can fly short distances.