A.1~3cmB.5~6cmC.10~15cmD.15~20cmE.20~25cm
A.8~10%B.10~25%C.34%D.5~10%E.3~7%
A.翻肛鑒別B.快慢羽鑒別C.羽色鑒別D.伴性遺傳鑒別E.外貌鑒別