Sam Woodhead became lost after going out for a jog from the Queensland cattle station where he was working.
The 18-year-old lost two stone in weight and survived the blistering 40C heat by drinking contact lens fluid and his own urine.
Woodhead said: "It was a really amazing feeling to be picked up and realise that I was actually going to make it through...and it wasn't going to be the end."
Claire Derry, Sam's mother, said: "His birth was one of the best moments of my life, and this is pretty close to it, getting him back again, because I was pretty convinced it was touch and go. I did an awful lot of praying during that flight."
More top news
Theresa May will hold fresh talks with European Council president Donald Tusk during a summit in Brussels today.
Ireland is facing the prospect of a winter general election after rival parties called on the Tanaiste to quit.
An investigation has estimated there are tens of thousands of predatory accounts, with paedophiles evading protection mechanisms.