Sir Eatman, it would be a good idea if i would live in some village around the city, as as long as i live in the straight center of the city, it is serious felony and i can be charged for using fire arms in populated area. In criminal law that article is known as "Violance to common security". As you Jack said it would be good to give a try to diabolos fired from airgun, but only in the case if the are already on the ground, to make that hit safe-if i miss then it will just went to the soil.
As for the cat, i already have one. And guess what. Say that cat is laying under crepe myrtel tree, magpie is gonna stay on the highest branches and make loudy noises untill cat finnaly have enough and move away.
I think that im gonna try several techniques. Ill explain some of them later.