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."
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Police said the child, who was without a driving licence, was trying to make his way 2,500 miles from the east coast to Perth.
The 24-year-old was charged with 14 counts of wounding with intent to do grievous bodily harm and one count of throwing a corrosive fluid.
Winds will veer northerly overnight with colder air streaming in over the next few days.