Residents of southern Sydney, Australia have been in a long-term battle over garbage—humans want to throw it out, and cockatoos want to eat it. The sulfur-crested cockatoos that call the area home have a knack for getting into garbage bins, and people have been using inventive devices to keep them out. Researchers detail the techniques used by both people and parrots in a study publishing on September 12 in the journal Current Biology.