There shouldn't be! Saying "bird of the sun" is just nonsense of our descendants. I think it's the practical part of the ancient people for gilding gold! According to the form, it should be called "twirling bird". Otherwise, what about other animals and plants that wander around in the future? Who can say that there will be no donkeys, chickens or rabbits, fish and so on? I believe there will be! Want to see it? ..... wait and see!