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
Gate deities of the underworld whips, four falcon heads and four human heads. This is an enigmatic and barely understandable point. 8th gate: this access is inhabited by a flaming snake who burns up the enemies of Osiris. 9th gate: here stand Horus and Set on a hawk-headed lion. 10th gate: Apep appears again, but chained in order not to harm Ra in his transit. 11th gate: this gate is called "Mysterious Of Approaches" and is overseen by the cat-headed god Meeyuty ("meow" onomatopoeia). 12th gate: here stand the goddesses Isis and Nephthys in the form of snakes: the journey through the gates of the