Thanks for the replies.
@CrematedPumpkin: From what I've seen birds don't have that talon thing on their wings.
Bats have those.
@cryssy: You're right.
I've actually made her skin all shiny and stuff in the beginning but it didn't look good to me so I've ditched it and went for the opposite.
Looking back at it I see that this wasn't the best decission.
@Ben2theEdge: Actually I was thinking that the arm would be completely covered by feathers making it look kind of 'cut off' but I guess a bit more smoothness in that area won't hurt.
I've changed the skin colors, added part of an arm that dissolves into the wing and slightly altered her pose.

->

What do you think?