Australia Removed 90,000 Sheep From 155,000 Acres of Outback — The Before⁄After Doesn't Look Real

In 2011, Peter Ashton had been managing Bulkomata Reserve for several years, when he saw it. He was out checking the property, 63,000 hectares of South Australian outback, 100 miles west of Broken Hill, one of the most remote pieces of land in the country, when he spotted movement on Eagle Rock. He stopped. He looked again. It was a yellow-footed rock wallaby, striped tail, orange shoulders, markings so vivid it almost didn't look real. The last confirmed sighting of one at Bulkomata had been in 1924. Peter had been living on this land, managing it, walking it in all weathers, and in all that time, not once. But then, one afternoon on a rocky outcrop, after 86 years of silence, there it was. This land had once run 90,000 sheep. Its shearing shed processed 100,000 animals a year at its peak. When Bush Heritage Australia bought it in 2006 and pulled the livestock off, everyone in the district thought it was a waste of a good station. The country gets less than 8 inches of rain a year. The soil was compacted. The foxes were everywhere. What exactly was supposed to come back? Something did. The wallaby. Then the birds. And then, in 2025, 272 individuals of a species, the Zoological Society of London, ranked as the single most evolutionarily irreplaceable bird on Earth. Found here, in a place where fewer than 90 of them had been recorded across all of South Australia in the previous 100 years combined. But here is the part that stopped the scientists cold. Nobody put them there. What 150 years of continuous grazing does to land like this is not immediately obvious. The damage is quiet. Cumulative. The kind that looks, from the outside, like nothing has happened at all. Boolkumatta sits at the edge of the Uluri Ranges, 100 miles west of Broken Hill, 63,000 hectares of saltbush plains, mulga woodland, and ephemeral wetlands that receive less than 8 inches of rain a year. Flat. Brown. Dry. The kind of place you drive through on the way somewhere else. The Adnyamathanha and Wilyakali peoples, the traditional custodians of this country, managed this landscape for thousands of years before European settlement. The saltbush plains supported yellow-footed rock wallabies known to the Adnyamathanha as the Andiu, a totem species woven into the culture and identity of this people for generations. The open native grasslands held plains wanderers. The creek lines ran, at least seasonally, with enough water to sustain a functioning food web. Then came the sheep. At its peak, Boolkumatta ran up to 90,000 sheep. And sheep, on land like this, are not neutral. They compact the soil so that rain runs off instead of soaking in. They strip the native shrubs and grasses that ground-nesting birds depend on. They consume the seed bank before new growth has any chance to establish. The plains wanderer is sometimes called the Goldilocks bird for a reason. It requires a very specific habitat structure. Low-growing native shrubland and grassland with enough open ground between plants to move, forage, and nest while remaining hard to see. Sheep don't just compete for that habitat. They dismantle its structure entirely. The plains wanderer doesn't adapt. It disappears. And then there were the foxes. Where sheep go in Australia, foxes follow. Introduced in the 1860s for sport hunting, the red fox spent the next 160 years dismantling every small mammal and ground-nesting bird community within reach. In a landscape with no evolutionary history of foxes, where native animals had never developed the instincts to survive one, it was catastrophic. By around 1924, the yellow-footed rock wallaby had disappeared from Bulkamata entirely. Based on the documented spread of fox populations across inland South Australia during that period, it is reasonable to infer that the expanding fox front pushing into the rocky outcrops that had been the wallabies' last refuges was the decisive factor. The Andou had survived a century of sheep. It could not survive the foxes, no confirmed sighting, for more than 80 years. The station managers working Bulkamata in the 1990s had never seen a yellow-footed rock wallaby on Eagle Rock at dusk. They had no frame of reference for what was missing. But some of you watching this do. Research published in People and Nature, Jones and found that people over 55 carry more accurate memories of ecological abundance than younger generations, even accounting for cognitive aging. You remember what the fields sounded like when you were young, the birds in the morning, the insects on a summer evening. That memory is not nostalgia, it is data, the only living record some of these landscapes have. You are the last generation that knows the difference between what this land is and what it used to be. Bulkamata in 2006 looked like land that had always been this way. It hadn't. The thing that nobody had fully tested in this part of Australia, at least not at this scale, was a deceptively simple question. What if you just stopped? What if you removed the ongoing pressure, the sheep, the foxes, the compaction, the stripping, and gave the land the conditions it needed to function on its own? Not a dramatic rescue operation, not a reintroduction program with transport crates and cameras, just the patient, systematic removal of the things that had been making recovery impossible for 150 years. Bush Heritage Australia had been working with this logic for years. In 2006, they purchased Bulkamata with support from the Australian Government's Natural Heritage Trust and the Nature Foundation South Australia, a multi-million dollar, multi-decade commitment funded 79% by private donors. Not a government program. People who decided some landscapes were worth keeping. Here is where the story gets more honest. Removing the sheep was not a simple decision. The people who ran Bulkamata for 150 years were not reckless. The land still retained remarkable examples of intact saltbush plains, evidence of careful management. Across Australia and beyond, there are legitimate debates about destocking. Whether adapted livestock can coexist with restoration, what rewilding actually means for landscapes people depend on. Professor Ian Gordon's concept of rewilding light reflects a real tension serious conservationists grapple with. Bush Heritage's position was not that grazing is always wrong, it was that this land under these pressures needed a different path. The sheep came off, all 90,000 of them. And then the real work began, two tools deployed together, neither of which would have worked without the other. The first was landscape rehydration through check banks, low earthen barriers built across creek lines that slow runoff instead of letting it drain off the hardened soil within hours. The water spreads sideways, sinks in, drops its sediment. Native seeds riding in that sediment get their first real chance at germination. Within a single wet season, the difference between a creek line with check banks and one without is visible to the naked eye. The second was fox and feral goat control through Operation Bounceback, a landscape scale predator program running in this region since 1991. Bounceback uses 1080, a compound that occurs naturally in more than 30 native Australian plants and that native animals tolerate well. The introduced red fox does not. Populations recover if baiting stops, which is why the program has run continuously for more than three decades. By 2006, fox pressure across the Olari Ranges was already lower than at any point in the previous century. The numbers that followed are worth sitting with. Since Bounceback began, more than 200,000 feral goats have been removed from the region. And in 2018, wildlife monitors surveyed Bulkumata specifically for foxes. They found zero, not a reduced number. Zero in country where 10 to 20 foxes per 100 km had been the baseline for decades. That single result is what made everything that came next possible, which meant that when Bulkumata's sheep came off and the habitat began to recover, the animals that were supposed to be there were already moving. The science predicted gradual improvement, a decade, maybe two. It started faster than that. Within a few years of de-stocking, the saltbush was visibly recovering. The check banks were holding water days after rain, sometimes weeks. Native grasses and shrubs were establishing in areas where they had been absent for years. And then, sometime in the years following the purchase, something appeared on Eagle Rock at the northern end of the reserve that had not been confirmed there since 1924. A yellow-footed rock wallaby. The Andu, the totem species the Adniya-Mathanya people have known and named through the entire period of its absence from this land. The immediate question any reasonable person asks, did someone put it there? No. Nobody flew it in, nobody released it. To confirm this, researchers at the University of Adelaide analyzed DNA from wallaby scats collected across Bulkamata and compared them with animals from neighboring properties. The results were unambiguous. The Bulkamata wallabies were genetically closely related to the population at Bimbori Conservation Park, roughly 15 kilometers away. As bounceback reduced fox numbers across the region and the Bimbori population grew, young animals dispersed outward. They crossed 15 kilometers of outback on their own and found a place that, for the first time in over 90 years, was safe enough to stay in. They stayed. They bred. By 2017, a decade after the purchase, wallabies were being seen regularly on the reserve for the first time in living memory. Dedicated volunteer researchers Tony and Meredith Geyer documented a female andu with a large joey on Eagle Rock at dusk. That image, of an animal absent for nearly a century now moving through its ancestral range with a young one in her pouch, says more about what was happening at Bulkamata than any graph could. The wallabies were back. And they were not the only ones. In 2017, a field researcher named Emily Matthews was driving a dirt track through Bulkamata at dusk when she had to stop the car. Standing in the middle of the road was a small bird, brown, compact, about the size of a quail. It didn't flush. It didn't panic. It looked at the headlights, took its time, walked across the road, and disappeared into the shrubland. Emily sat there for a moment, then she got out of the car. She described it later, they couldn't believe it. Their first thought was, what is happening here? They found a female, then a male nearby, then an active nest with eggs. She knew exactly what she was looking at, a plains wanderer, the only living member of its entire family, a branch of the evolutionary tree developing in isolation for 60 million years. If it goes extinct, what is lost is not just a species, it is an entire chapter of vertebrate history with no backup copy. By the time Emily's three-month posting ended, she had documented eight individual plains wanderers at Bulkamata, more than had ever been recorded at the reserve in a single season. In 2019, Graham Finlayson, Bush Heritage's South Australian Arid Rangelands. Healthy Landscapes Manager encountered three birds in a single day and held his breath, hoping they might be a breeding pair. The scientific consensus had been clear. The plains wanderer's viable habitat was in native grasslands of Victoria and New South Wales. Semi-arid South Australian outback was considered marginal. Not where you looked for a population that mattered. Fewer than 90 sightings in all of South Australia across the previous 100 years. And then came August of 2025. A peer-reviewed study in ecology and evolution, led by PhD candidate Saskia Gerhardi at the University of Adelaide, published field survey results from September 2022 to May 2024. The team combined spotlight surveys with acoustic song meters and miniature GPS backpacks light enough to sit between a bird's wings, sensitive enough to detect animals that earlier surveys had been walking past for years. The data is not a perfect census. The 272 figure represents confirmed detections, 211 adults and 61 dependent chicks, but it is the most rigorous count ever conducted for this species anywhere. 272 individuals at a single reserve the science said couldn't support them. The entire known global population of the plains wanderer sits somewhere between 250 and 1,000 mature individuals. Nobody has a precise figure. The species has never been surveyed at this sensitivity across its full range. Bull kumata may hold a quarter of every plains wanderer alive on Earth. The birds found their way here on their own. The land made it possible. As Saskia Gerhardi put it, it is a reminder that even when things look very dire for a species, staying optimistic matters because sometimes hope and 272 plains wanderers can be found in the most unexpected places. Stand at Eagle Rock on Bull Kumata today as the light goes orange and look east. The salt bush and low shrubland stretch thicker than the old station records would suggest possible. The creek lines hold moisture days after rain. The mulga woodland is filling in and somewhere in the open shrubland below the ridge, 272 plains wanderers are going about their lives, invisible against the ground they have pressed themselves into for 60 million years. Now look west at a neighboring property still running livestock. The understory is thin. The creek lines are scoured. The soil is hard. Across most of inland South Australia, that is still the dominant picture. Millions of hectares still under the same pressures that emptied Bull Kumata over a century. What happened here did not happen out there. Not yet. The numbers from the years following de-stocking need no graph. White-winged fairy wrens up 235%. Redthroats up 395%. Rufous field wrens, nearly absent before, up 655%. The dusky hopping mouse, nationally vulnerable, was recorded at Bull Kumata for the first time, the southernmost record of the species ever documented. Counts, not projections, before and after on the same land. The implications extend well beyond this station. Scientists had long assumed that peripheral populations, groups at the edges of a species' known range, mattered less than the core. The outliers were expendable. Bull Kumata breaks that assumption directly. If the plains wanderers' core range in Victoria and New South Wales collapses in a drought or a fire cycle, Bull Kumata may be what's left. Not a footnote. A lifeline. This is not a uniquely Australian story. The same logic has played out wherever people have removed the pressure and held the line. Bison on degraded plains. Wolves reshaping landscapes they had been absent from for decades. Beavers rebuilding river systems across continents. The mechanism is the same everywhere. What changes is only whether anyone has the patience to let it run. Bush heritage is not done at Bull Kumata. Predator control through bounceback continues every year because it has to. Fox populations recover if baiting stops. There is no version of this story where the pressure stops mattering. The plains wanderers' Victorian and New South Wales populations are still declining. A single severe drought could test everything built here in the last two decades. These are not small risks. What Bull Kumata has already changed is permanent. 272 birds, confirmed in peer-reviewed research, have redrawn the map of where this species can survive. That knowledge did not exist before 2006. Is it worth it, at this scale of effort, this permanence of commitment, for a bird most people will never see, on land most people will never visit? The plains wanderer is the only living member of its entire family. 60 million years of evolutionary history, no backup copy. In 2018, the Zoological Society of London ranked it the single most evolutionarily irreplaceable bird on Earth. If it disappears, an entire branch of the tree of life disappears with it, one that took longer to develop than mammals have existed on this continent. But here is the question that cuts closer. Is it too late for the places you remember? Bull Kumata was emptied over 150 years. It started coming back in 19. The land that looked in 2006, like it had always been this way, turned out to remember exactly what it was supposed to be. Foxes gone, sheep off. Water slowed long enough to sink in. The baseline is not fixed, that is what 272 plains wanderers actually prove. Not that everything will be fine, but that the land, given the right conditions, still knows what it is doing. Sometimes the powerful intervention is not a reintroduction program or a government plan with a hundred line items. Sometimes it is just removing what was in the way and trusting that what was there before still wants to come back. If this research made sense to you, the next one will too. We just covered what a fried chicken CEO did with the worst land in Texas in 1969 and why nobody believed him. It is already on the channel.