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 Dongyi and Huaiyi. As result, the Rebellion of the Three Guards began the military conflict between the Zhou dynasty and the independent tribes and states of the East, which would last until the fall of the Western Zhou in 771 BC. The Duke of Zhou also recognized that the kingdom was too large to be ruled from the western court at Fenghao, so that he decided that "the construction of an eastern administrative center seemed inevitable if [the Zhou kings] were to maintain their rule in the east". The second capital (Chengzhou/Wangcheng) was located near Luoyang, though it is still