Parrot Without Upper Beak Wins 36 Fights Unbeaten... What's the Secret to Its Dominance?

Undefeated in Battle with "Beak Jousting"
Researchers: "An Example of Animal Adaptation Overcoming Disability"

A case has come to light in which an endangered parrot, having lost its upper beak, used this disability as a creative weapon to rise to the top position in its flock.

On April 20 (local time), The New York Times reported that researchers from the University of Canterbury in New Zealand released these findings in the international academic journal Current Biology.

According to the researchers' paper, Bruce, a Kea parrot, lost his entire upper beak in an accident as a chick. The Kea is a species native to New Zealand, known for its high intelligence and problem-solving ability.

However, Bruce achieved the number one rank in the dominance hierarchy through a distinctive combat style that leveraged his beak disability. Over a four-week observation of 12 parrots (9 males, 3 females) in a sanctuary, the researchers recorded a total of 227 fights. Bruce participated in all 36 of his encounters and emerged victorious every time.

Bruce the Kea parrot, who became the leader of the flock by using a beakless disability. Photo by Alex Grabham

Unlike typical Keas, which attack by biting the opponent's neck with their curved upper beak, Bruce used a method called "beak jousting," thrusting his remaining lower beak like a spear. He would lower his body and rush quickly at his rival, stabbing at their wings, legs, or head.

Bruce's attacks were also notably effective. While other individuals primarily used neck-biting attacks (67% of the time), Bruce employed his spear-like thrust in 62% of cases. This method forced opponents to retreat immediately in 73% of encounters, showing a higher success rate than kicking attacks. Additionally, Bruce attacked more than five times as often as the others.

This dominance was also evident in physiological indicators. Bruce had the lowest stress hormone levels and always secured priority access to food. Other individuals also exhibited typical dominant behaviors toward him, such as preening his feathers. In previous studies, Bruce also demonstrated "tool use" by using stones to preen his feathers.

The lead researcher explained, "Bruce secured the position of alpha male with an attack technique that individuals with a complete beak could not imitate," adding, "This is the first case in which an animal has overcome a disability and maintained its status through behavioral innovation alone." The researcher further noted, "This study demonstrates that disabilities in the animal kingdom can be the catalyst for new strategies, rather than simply being a disadvantage."

However, the researchers cautioned that "since this case was observed in a sanctuary environment, it is difficult to generalize directly to the wild." They also pointed out that "the beak is a critical organ for Keas to obtain food, so individuals in nature may face much greater survival challenges."

This content was produced with the assistance of AI translation services.