Ellis knew many of these animals well. When she was a young girl, Ellis and her family used to hunt the mala, a tiny hopping macropod whose creation story began close to Newhaven; the mala's sacred sites remain but the mala itself disappeared from here in the 1980s. There was the greater bilby, otherwise known as "Australia's Easter Bunny", thanks to its large ears and its role as one of Australia's best-loved marsupials. Or the burrowing bettong that dug deep burrows and turned over the soil, earning the admiration of scientists who call it Australia's great ecosystem engineer.
All of this matters for many reasons, not least among them this: 86% of Australia's 315 surviving land mammal species live nowhere else on Earth.
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In 2006, with the scope of the extinction crisis in Australia's arid interior becoming clear, the AWC began an experiment: they wanted to see if the land in places like Newhaven could be returned to its original state. Ellis, and other Warlpiri rangers, led the way.
For months, Ellis and her colleagues tracked down the feral cats within a 94.5sq km fenced enclosure that lies close to the sanctuary's headquarters and tourist campsite at the heart of Newhaven.
There are many ways to track cats and other wildlife, but none have proved as effective as indigenous trackers. In the Warlpiri tradition of "reading the country", Ellis and the others understood cat behaviour. They knew where to find and follow cat footprints, then interpret what the tracks meant. How many cats were there? In which direction were they travelling? When did they pass? "Indigenous trackers are much better than what we can do with live traps or cameras," said John Kanowski, AWC's chief scientific officer.
With the feral cats gone, an ambitious programme of mammal reintroductions began.
"Conservation isn't just a matter of putting a line around a property and saying 'here's this ecosystem we've preserved'," said Kanowski. "You haven't achieved anything if you haven't got the critical animals back in there. The introductions complete the conservation journey for a particular piece of land."
Black-footed rock wallabies and red-tailed phascogales, woylies and brush-tailed mulgaras all returned. And yes, the mala and burrowing bettong are also back where they belong, decades after the desert fell silent to their calls. Remarkably, the scientists hope that the bettongs may even return to the same burrows that their ancestors dug nearly half a century ago.