Crows are smart- most intelligent of birds. Have been found to be not only tool users, but tool makers. The Morrígan- Irish Goddess of War and Death-is represented by a crow.
They are highly destructive of crops and other wildlife. There are limits on WHEN they can be taken, but no bag limit. Have not used .17 HMR on them (I may this summer)- but a .22 bench rest rifle, used from a sniper's hide works quite well.