Connecting the bump map to a little displacement also, helps with the black patches on the wings and don't forget to check Backfacing forward on the render settings.

 I mentioned the subD in another app, wings3D and a tutorial on how to do it, twice in this thread.  Maybe I should have given that tutorial link? Nah, that would be to easy. ZBrush is an expensive way to do it it you don't have it. Any modeling app that you have will do the same thing.

"Thump, thump, thump... Is the mike on this time?"