Overview
- The peer-reviewed study, published Monday in Current Biology, shows Bruce used a forward 'joust' with his exposed lower beak to claim alpha status without help from an able-bodied ally.
- Researchers logged 227 agonistic interactions in the 12-bird group, and Bruce won all 36 contests with males as his joust forced rivals to yield about 73% of the time.
- His rank brought clear benefits such as first access to feeders, grooming from lower-ranked males, and the lowest corticosterone metabolites that signal reduced stress.
- Bruce also uses small pebbles to preen himself, which the team identifies as the first recorded self-care tool use in a kea.
- The authors say this single case shows how innovation can offset disability in a cognitively flexible parrot species native to New Zealand, raising when-to-intervene questions for animal care.