I would think flu flu arrows and blunt tips. The lost arrows would get expensive if you just used regular fletching. And probably lots of practice with your bow, if you plan to shoot them on the wing.
For starters... A bow. Don't go very expensive on the arrows. Use an e-caller and decoys along with a recently killed varmint critter native to the area... A dead squirrel, coon, or bunny will have them going mad. Get them to land and it's on. The e-call will free up your hands. Get in a woodline and place your setup 15 yards out. Should make for an interesting day.
That's how I would do it, anyway :)
If you are a member there is a section in the Advanced Techniques called "Bows for Crows". Our own Doug Wigfield has done what you are asking about. Good hunting.
i got pics here http://www.facebook.com/home.php#!/photo.php?fbid=10150288889563969&set=t.100001015136271&type=1&theater and here http://www.facebook.com/home.php#!/photo.php?fbid=10150285041173969&set=t.100001015136271&type=1&theater
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If it flies it dies, if its a crow it dies too, if its brown its down, if it calls if falls, if its red its dead