A photo provided by the University of Auckland shows Bruce, a disabled parrot who has designed and uses his own prosthetic beak for preening. With pebbles held between his lower beak and tongue, Bruce is able to compensate for his damaged upper beak. Patrick Wood/University of Auckland via The New York Times

Bruce the parrot invents his own tool

The bird is a kea from New Zealand, and his fabrication of an instrument to help him preen his feathers appears to be unique, researchers say