CC0 Creative Commons

Cornelia Habl, a master’s student at the University of Vienna, and Alice M. I. Auersperg, a researcher at the University of Veterinary Medicine in Vienna, ran several experiments. They reported in the journal PLOS One that the cockatoos were not only able to match the shapes to the holes but did much better than monkeys, chimpanzees, and even toddlers. As seen in this video by The New York Times.