Police have called off the ground and aerial search for missing prospector Michael Keith Graham, two weeks since the 46-year-old New South Wales tourist was last seen at a campsite north of Menzies.
The 13-day search deployed three aircraft, trail bikes, mounted police, specialist trackers and scores of emergency services volunteers combing several hundred square kilometres of mulga forest.
Emergency services will continue daily checks of the 20 survival packs hung at strategic points about the search area.
This will include the gold-panning camp where Mr Graham was last sighted and the windmill where a station owner found SOS signals hacked in the dirt a week ago.
The wife of the missing prospector, contacted on the drive home and outside the town of Nullarbor, said she was not surprised to hear the news.
It is expected the search will continue in an unofficial capacity with a party of three civilian quad bikers still operating in the search area and several more declaring they would labour until a body was found.