QUOTE (Irion @ Apr 7 2011, 05:58 PM)

RAW both interpretations are valid.
Yes, the ability is 100% magic. But this does not mean that the wings do not have a purpose. May be they are required to make the magic work.
Since RAW and RAI are unclear in this instant, balance wise it is not a big deal I think you should go with the solution offering more possibities in the realm of roleplay.
So Pixies can't fly without their wings.
Not at home right now, but I remember something about critters mentioned in my old 2nd edition BBB that, while a pegasus or a dragon can fly, physically speaking the wings and the body structure don't make this possible, so parascientists speculated that it is somehow connected to ambient mana.
Perhaps, the wings are a necessary part of the body to interact with the enviromental mana. In this scenario, as long as you have wings and there is Mana (even if aspected), the critter can fly. The other possible scenario is that wings are just vestigial limbs and you just need enviromental mana to fly.
There is the last scenario that somehow the wings and the wings alone lift the body and while it may work for pixies, I don't see how it would work for other heavy flying critters.