birds. Unlike an ordinary snake in nature, it may also be depicted with additional appendages such as animal legs and feet, also manifests tails of various forms in rock art. The Rainbow Serpent is also representative of Yams and water-lilies. Heavy rainfall brought an abundance of both to the land and there is rock art depicting the serpent as a "Yam Serpent". Other rock art depicts the Rainbow Serpent with a flying fox head or like attributes. On the Arnhem Plateau in Australia, there is also early art depicting the serpent as an urchin or "seaweed like." It is believed that early painting of the serpent had similar characteristics to that of a seahorse, for example, a curved body, long nose, and curved tail. All depictions of the Rainbow Serpent in rock art are very detailed and similar across Australia. The main regional differences found between the serpent rock art are in the tail of the serpent and the head of the serpent; some have 3 tails and others, a crocodile's tail. Possible origins in nature Various species/taxa of snakes in the natural world have been proposed as the model for the rainbow serpent. One suggestion is that it is modeled on the "rock python", regarding the rainbow serpent in the myth of the Wawilak sisters among the Yonglu people. In some tellings of the sisters myth, the encounter with the Yurlunggur serpent occurs in its water-hole called the Mirrimina well, glossed as 'rock python's back'. Specifically, the banded rock python (aka Children's python; Liasis childreni syn. Antaresia childreni) has been identified with the Yurlunggur by one researcher. This species is of brown colour (cf. Yurlunggur described as "giant copper snake") flecked with darker patches and having a ventral side that is opalescent white. Another suggestion is the Oenpelli rock python (aka Oenpelli python), which is called nawaran in the native Kunwinjku language, according to whose lore grew into the Ngalyod serpent. This snake is also brown with darker blotches with iridescent scales. Another candidate is the water python (Liasis fuscus), which is a particularly colourful snake. The carpet snake (Morelia spilota variegata) is considered a form that the Rainbow Serpent can take by the Walmadjari people in northern Western Australia. The Kanmare or Kooremah of Queensland are also considered enormous carpet snakes, as already mentioned. There are also some geologist that study and look at the Rainbow Serpent art