What is the largest living bird in the world? Spell it.

The Ostrich is the largest living species of bird in the world. It is unique in its appearance, with a  long neck and legs and it can run at maximum speeds of about 70 km/h or 43 mph.

If you are looking for the answer to What's My IQ Puzzle 47, it is not about how you spell ostrich, but the answer is how you spell it. It is spelled I-T.