It was introduced by Li Yuhuan- a villager of Datang town, Guidong county that he found this feather which was with a bird egg on it in his tomato field. Before he found this, he was surprised to see a bird which dangled with something to fly to his field. A moment later, he passed by the field and discovered this bird egg on the feather. Finally he understood that the smart bird used this feather to help it to move the new houses.