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
Iconostasis of the Cathedral of Hajdúdorog iconostases he created, the holy doors have rich ornaments and a carved animal figure on top of each. In the town of Eger, Jankovits added a double-headed eagle to the top of the Royal Doors, in Budapest two doves decorate the gates, and in Hajdúdorog it is two ravens. The birds are holding an episcopal crown with a Greek cross on it. Ravens have multiple meanings in Christian art. The black bird symbolizes darkness and the underworld leading to the world of the dead. Alternatively it appears many times in the Bible as God's bird. It disappointed Noah, but ravens