What is the second tallest standing bird?

love to know this info .. but repeating it ???

Mini, and I'd like to know just how tall

Mini, exactly what I was thinking. Maybe they wanted to fill up more space & look like they're giving more info than they really are

An ostrich is much taller according to my knowledge. However, I got the answer right on the choices given.

first to come up my mind is ostrich personaly i saw it