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
Underworld: Rise of the Lycans Lakeshore planned to release a prequel as the third film following "Underworld"s sequel, "" (2006). Kate Beckinsale, who portrayed Selene in "Underworld", expressed interest in reprising her role for the sequel and the prequel. In December 2005, "Underworld: Evolution" director Len Wiseman explained that the "Underworld" franchise was originally conceived as a trilogy. Wiseman said, "We sort of mapped out an entire history and story... a massive collection of ideas and stories that we're putting out at certain times." Wiseman anticipated creating a third installment for the franchise based on the audience's reception of "Underworld: Evolution", which would be released