This morning, I filmed sulphur-crested cockatoos in the park opposite my flat, eating the nuts of the bunya pine, several of which grace the park. The cones, which can weigh as much as 10 kg, drop to earth in January and February. For the past two years no cones had fallen. This season there was a bumper crop. The birds are well equipped to get at the nuts, tearing at the thick outer covering with their powerful beaks, while keeping the cone steady with their equally powerful feet.