i wouldnt personaly go out and kill magpies as im a bird lover , but farmers see them as vermin also crows tend to peck the eyes out of new born baby lambs at lambing time , hence farmers used to shoot the crows and pin them to the fence they have a lively hood with chicks from chickens ectra to protect havent they ? same as the fox lovely to see but they make a mess if they get in a chicken shed , and its usualy older less fit foxes that do this because they cant catch the natural prey like rabbits as they get older.