SouthShooter pretty well covered it. Get a good 12 or 20ga(20ga will have less recoil) in whatever style strikes your fancy (side-by-side, over-under, pump, etc) with modified, full, and extra full chokes and you will be ready for just about anything with wings. As far a range the 12 will reach slightly farther than the 20 but I haven't really found this to be a problem. My 20ga has killed everything I shoot at.