Caduceus is a continuation of the older Indo-European dragon-slayer motif. Wilhelm Heinrich Roscher (1913) pointed out that the serpent as an attribute of both Hermes and Asclepius is a variant of the "pre-historic semi-chthonic serpent hero known at Delphi as Python", who in classical mythology is slain by Apollo. One Greek myth of origin of the caduceus is part of the story of Tiresias, who found two snakes copulating and killed the female with his staff. Tiresias was immediately turned into a woman, and so remained until he was able to repeat the act with the male snake seven years later.
Rainbow Serpent tells of how Rainbow Serpents, or Wagyls, smashed and pushed boulders around to form trails on Mount Matilda, along with creating waterways such as the Avon River. A myth from the Northern Territory tells of how a great mother arrives from the sea, traveling across Australia and giving birth to the various Aboriginal tribes. In some versions, the great mother is accompanied by the Rainbow Serpent (or Lightning Snake), who brings the wet season of rains and floods. Some Aboriginals in the Kimberley regions believe that it was the Rainbow Serpent who deposited spirit-children throughout pools in which women become