Think about it this way. It'd be like if I called a starfish just a normal fish. It's the same basic thing, isn't it? But it still has a proper name, and we use that proper name. As for the the flying..it's all with a broom.

You had me up until snow stars. How does one make a star out of snow? [The Muggle way. He's pretty sure he could easily make a star out of snow.]