Troides helena common in many of the localities in which it occurs, was classified as vulnerable in 1985. Helen in Greek mythology Helen was the daughter of Zeus. Cerberus or Kerberos, in Greek and Roman mythology, is a multi-headed hound which guards the gates of the Underworld. This species is protected under Wild Animals Protection Ordinance Cap 170 in Hong Kong. The common birdwing is protected in Indonesia and may also require protection in peninsular Malaya also. It is listed in Appendix II of Convention on the International Trade in Endangered Species of Wild Flora and Fauna (CITES) as are all other
Rebellion of the Three Guards Prince Wu Geng. The Three Guards' main force was also defeated, and Guanshu Xian and Huoshu Chu were captured, while Caishu Du fled into exile or was banished. Guanshu was executed and Huoshu stripped of his titles and demoted to a commoner. Despite his victory, Duke of Zhou pressed on and further campaigned against the eastern rebel allies that were located beyond the Zhou kingdom's borders. Shortly after the Three Guards' defeat, the loyalists advanced into Shandong, with Duke of Zhou personally commanding the conquest of Feng and Pugu. Yan was also attacked by loyalist forces, but managed to hold