The Sunbird was an alien creature in the science fiction novel " The Three Bodies." It had high intelligence and the ability to fly. It could hover in the air and perform complex spatial operations. The body of the sunbird was made up of many flexible, transparent " feathers " that could be adjusted to change its shape and flight direction. They usually used "fusion" energy to drive flight, which converted the heat generated by the nuclear fusion reaction into kinetic energy to achieve high-speed flight. In the novel, the image of the sunbird symbolized the high development and wisdom of the alien civilization, as well as the helplessness and despair of mankind in the face of the invasion of the alien civilization. The appearance of the Sunbird was also one of the warnings and challenges that the Three-Body Civilization issued to mankind.