I, Herison Ralainony, would like to know if you could identify this moth for me. I reside in Australia.
Your moth is a Sphinx Moth or Hawk Moth in the family Sphingidae. We located a wonderful website with photos of both Hawk Moths and their caterpillars from Australia, but a cursory search did not provide an exact match. A more thorough search of the likliest candidate, Coequosa australasiae, let us to another page that shows enough individual variation that we are almost certain, Coequosa australasiae is your moth.