I've used both .22 rifle and 12gauge for predator elimination. And a muzzle loader and my .308 deer rifle for coyotes. Its pretty much whatever is easiest to access in the heat of the moment lol.
Now
@Noobihen when you say AR-22 I think you are referring to a .22 rimfire in the AR platform? Just wanted to clarify that beings some of mentioned it as the -15. Which is a .22 caliber also and not a high powered rifle anyway but definitely not the little rimfire.
And no I do not sit out and keep watch, don't have time for that. I mostly just say a prayer for the birds to be safe, been working pretty good so far