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 Kunapipi, all of whom know ancient secrets, and the Serpent is merely angered by their presence in its area. The Rainbow Serpent then traces the scent back to the sisters sleeping in their hut, a metaphor for the uterus. The Rainbow Serpent enters, a symbolic representation of a snake entering a hole, and eats them and their children. However, the Rainbow Serpent regurgitates them after being bitten by an ant, and this act creates Arnhem Land. Now, the Serpent speaks in their voices and teaches sacred rituals to the people living there. Another story is from the Great Sandy Desert