Dunno why, it may not be canonically possible but she just is.

Or is it? Who knows, maybe the thing with the vampire fruitbats and Twilight's spell would work on anypony staring at them...

Then again, she doesn't have wings to begin with, so maybe they'd need to make her an alicorn first...

Yeah okay, I wouldn't really want that to happen, we still need at least one unicorn!

Still, maybe a pony could still have vampire fruit tendencies without the bat-wing part? Who knows.

Hm anyway, half ramble, half showcase of some of my favorite fanart here lately I guess. Enjoy!