Varmicide, I've had good luck using the rifle when set up on bait, usually deer carcasses.
I also drive the dirt roads and get some spot and shoot hunting, but they get wise to that too.
I once shot a crow in a tree and it got caught in a branch half way down. I called the crows back with my mouth and when they seen there budy flailed out in that tree they went nuts. Typically the wont' land again but some of them did and I killed another. When the dead crow falls to the ground I never had that reaction before.