\'Shoot all the Bluejays you want, if you can hit \'em, but remember it\'s a sin to Kill a Mockingbird.\'Lawyer Atticus Finch gives this advice to his children as he defends the real Mockingbird of Harper Lee \'s classic novel - a black man charged with the rape of a white girl.. \'Shoot all the Bluejays you want, if you can hit \'em, but remember it\'s a sin to Kill a Mockingbird.\'Lawyer Atticus Finch gives this advice to his children as he defends the real Mockingbird of Harper Lee \'s classic novel - a black man charged with the rape of a white girl.