Getting the correct backlight look on the bird is well beyond my meager photoshop skills.
Probably why I never do composite images.
I'm learning from this thread, also learning it is hard to do well.
Ray, I think you and I are struggling with the same challenge: the lighting on the birds gives away the fact that the image has been composited. I've been scouring the internet for techniques to process an image to make it appear to have been backlit by the moon. It can be done, but it seems that the effort involved is significant. Probably makes more sense to search our archives for a backlit bird in flight, or even just going out and capturing a new image.