Louis the young stork came into the world on a birch tree in Radolfzell on Lake Constance six or seven weeks ago. Until this day in June 2014, he has only known his parents and three siblings. But suddenly, strange beings have appeared at the nest and take the four small white storks captive. They are Andrea Flack and Wolfgang Fiedler of the Max Planck Institute for Ornithology and the University of Konstanz.