Pet cockatoos have to be the meanest birds on the planet. I never thought a bird could have feelings of jealousy and hate, but I'm certain this species does and with a beak that can snap car keys in half (lucky I carried a spare) you had best keep fingers far, far away. The owner laughed while telling me a story of a "love bite" she received while handling the bird that, unfortunately, clamped down on the class ring on her finger and disfigured the round shape to an oval. She noted that having a vise grip around proved most helpful that day.
Fear these evil birds.