Darius, the leader of a flock of birds, is wounded just before it is time for the birds to migrate to Africa. Information about how to lead the migration must be passed to the first bird that encounters Darius. That is Yellowbird who is excited by the challenge but has very little life experience. Karl expected to take over as leader but Yellowbird lies to the flock and leads them South for the migration. He is really only a young hatchling with no experience and endangers the flock many times. He lands in Holland and not Spain. Delf always supports him. Finally he tells the truth and it turns out the “Iron Bird” is not to be feared but really is a solution to their problem.