A Polish charity has been hit with a massive phone bill after a GPS tracker it had put on a stork was stolen. In April 2017, Polish environmental group EkoLogiczna placed a GPS tracker on the back of Kajtek, a white stork, to collect data about the bird’s winter migration route as well as its feeding habits. In the year that followed, Kajtek travelled some 6,000 kilometres but was last recorded on 26 April in the Blue Nile Valley in eastern Sudan.In a Facebook post, the group explains that “for unknown reasons” Kajtek stayed in the area for over two...