To echo Mary, a creature with wings on its ankles is going to strain credulity flying whilst oriented horizontally. Find the centre of mass of the creature and stick the wings somewhere near it - above if you want more upright flight, below if you want them to fly head-down (which would also look weird).
THis also leads to sex differences. On average women's centre of mass is lower, possibly leading to slower flight if they can't streamline as men may.
@controlgroup That's true. These creatures' wings extend from their backs in most cases (there are multiple species, so there are a few exceptions, but that's the norm), so I've decided a birdlike flight position makes the most sense.
