Tail covert, fan display, Institute of Zoology and Zoological Museum, University of Hamburg.
尾部覆羽，用于开屏展示，汉堡大学动物学会和动物博物馆。
2
The peacock immediately moves its tail, and the peacock's tail likes a colorful big fan, it is extremely beautiful.
孔雀马上就动动自己的尾巴，孔雀的尾巴像一把五彩洒金的大扇子，非常美丽。
3
Based on the principle of flight of fan wing aircraft, realizing methods of VTOL are preposed by changing the Angle of attack and increasing chord length of the tail.