We have four young magpies born to our farm who are become pests with a capital P! How do you scare them off safely? We have wonderful yellow finch, purple finch, doves, quail, etc. that we enjoy and feed. We don't want them to go away but if we don't scare off these magpies we won't have any of our deck lined wave petunias blooming and they are beginning to eat off our cherries. Help?