Harry spent a month Down Under with the Australian Army, an experience which involved learning bush survival skills, flying helicopters and working with elite SAS commandos.
The 30-year-old British prince also helped to snare a crocodile from a trap, pulling in the animal from Darwin Harbour and straddling it after its jaws had been taped closed.
"Prince Harry went out on the croc boat and helped our rangers remove a 3.1 metre (10 feet) saltwater crocodile from a trap in Darwin Harbour," Northern Territory Minister for Parks and Wildlife Bess Price said.
Prince Harry was welcomed to Australia by hundreds of well-wishers in Canberra on April 6 -- including one who asked to marry him -- but his day-to-day activities with the Army were kept under wraps.
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Ranger Erin Britton said Harry, who toured Afghanistan twice during a decade in the British Army, was not scared to get close to the crocodile, which was later taken to a local farm.
"He'd make a great croc catcher," she said. "He responded to directions when catching the croc, helped pull it into the boat and did a great job."
"I was a little nervous at first when I was getting the snout rope on the croc because Harry was observing so closely, but he was so easy-going that I relaxed pretty quickly," she said.
"I found him very approachable and easy to chat with."
Rangers in the Northern Territory often have to remove crocodiles from waterways used for boating and fishing to limit the risk of fatalities and injuries.
Crocodiles are common in Australia's tropical north where their numbers have increased since the introduction of protection laws in 1971 to around 75,000 to 100,000.