What can run but can't fly?

Question

I'm as small as an ant, as big as a whale. I'll
approach like a breeze, but can come like a gale.
By some I get hit, but all have shown fear. I'll
dance to the music, though I can't hear. Of names
I have many, of names I have one. I'm as slow as
a snail, but from me you can't run. What am I?

Answer 1

an ostrich
it is a bird which cannot fly but can run

Answer 2

In a river, the flow of water