If any of you are interested I have been selling an instructional cd that teaches you how to blow a hand held crow call. I also go into what the different calls mean as I blow each one. It takes time, you are not going to get good by just practicing on an odd afternoon, but if you stick with it you will get so much pleasure from calling "your own birds" into your setup.
I also have two DVD'S on the market on crow hunting. "The Art of Crow Hunting" has a 551 bird crow hunt. This DVD has a lot to offer "if you pay attention to the different setups" on decoy placement and blind (hide location) location.
The second DVD is called "Crow Shooting" and has several hunts where anywhere from 300 to 447 get shot in mid air.
If you are interested you can go to the educational section over at Crow Busters and find these products. They also sell decoys and all sorts of hand held crow calls. Just go to www.crowbusters.com
they will ship anywhere in the world.
Fox Pro Game calls in the USA is another very good company to do business with.