Crow, is a low polygonal model with high details texture , the wings can be folded in few steps .
i rigged the model with biped and one extra bone, i didn't use any scripts for the feathers .you can simply change the texture colours to be as you want .

Rigged with character studio and extra bones.
loop Animation .
flying loop animation

learning : you can learn very fast from this project once you open it you will find how easy to follow my steps to understand how i rigged it with Biped and controlled the feathers within on click .

Enjoy.