Here is a tip that I feel has helped me; I'll pass it along. Buy a box of clay pigeons and a can of flat black or brown spray paint. Take the pigeons and paint the orange or yellow centers brown or black & let them dry. Then find a spot where you can shoot them with some heavy brush in the back ground. Throw the birds so that they fly with the brush in the background, not sillouhetted against the sky. I believe that this "trains" your eye to pick up movement rather than color....most clay pigeons are yellow or orange...I've yet to see a grouse that color in the wooods. For those of you who are experienced wing shots, give this a try and see if it isn't a little humbling at first. Good luck and good hunting.