Could Australia’s feral banteng help save their species?

About 10,000 feral banteng live on Australia’s Cobourg Peninsula—roughly ten times the number estimated to remain in the wild in Indonesia. For an introduced animal that damages Australian habitats, that abundance presents an unusual possibility: the herd could become a resource for saving its critically endangered species overseas. Indonesia’s ambassador to Australia wants the two countries to investigate it.⁠¹

Siswo Pramono has proposed research cooperation between Indonesian national parks and the Northern Territory government, potentially leading to the return of genetically suitable animals. But this is a call to begin a conversation, not an agreed repatriation. He told ABC News that no formal talks had taken place; its November 5 report included no Northern Territory government response.⁠¹

The distinction matters. A large population outside a species’ native range can offer conservation options without automatically supplying the right animals, a safe destination or a reason to leave local environmental damage unchecked. The question is not simply whether Australia should protect banteng. It is what protection would achieve, for which populations, and at whose ecological expense.

Cobourg Peninsula lies about 200 kilometres north-east of Darwin and includes Garig Gunak Barlu National Park. Its banteng descend from animals introduced from South-East Asia during a failed colonial settlement in the 1840s. Nearly two centuries later, the Northern Territory government describes the peninsula as holding the world’s largest banteng population.⁠¹⁠¹¹

The population figures need their own caution. The estimates of about 10,000 on Cobourg Peninsula and about 1,000 in the Indonesian wild come from the ABC report, which does not supply survey dates or counting methods. They are not independently verified censuses, and the Indonesian figure is a national estimate—not the worldwide total.⁠¹

The species’ wider predicament is severe. The IUCN SSC Asian Wild Cattle Specialist Group says banteng were uplisted from endangered to critically endangered on October 28, 2024, following an estimated global decline of more than 80 percent over two decades, driven by poaching and habitat loss. That decline does not describe a comparable collapse in Australia’s introduced herd.⁠¹⁹

The Northern Territory’s banteng information page still describes the species as vulnerable. That wording has been superseded by the later conservation assessment; it should not be read as evidence that the species’ global position is less urgent.⁠¹¹⁠¹⁹

Pramono’s argument is that survival in Australia has preserved an opportunity. “Australia is amazing, it's just like Noah's ark from the Bible,” he told ABC. His comparison is an argument for investigating the herd’s value, not a claim that banteng have already vanished from Indonesia.⁠¹

He envisages cooperation in both directions. Some Northern Territory animals might return to Indonesia if found to be “genetically correct” for its national parks. He also suggested bringing additional banteng into the Territory to improve the Australian herd’s “genetic variety.” He wants discussions to begin between the Territory government and Indonesian national parks before involving Australia’s Department of Foreign Affairs and Trade. Neither suggestion is an announced animal-transfer operation.⁠¹

There is a scientific reason to take the idea seriously. A 2006 study identified pure-strain banteng in northern Australia using mitochondrial DNA, Y-chromosome sequencing and a nuclear gene encoding lactoferrin. ABC describes the study as examining more than 50 animals in Garig Gunak Barlu and finding genetics not typically seen in South-East Asia.⁠⁷⁠¹

But identifying ancestry is not the same as selecting animals for release. The historical finding does not establish that particular banteng today would be compatible with a particular Indonesian herd, healthy enough to move, or beneficial to that herd’s future genetic diversity. Those are separate questions requiring fresh assessment.

A separate 2007 paper addressed low genetic diversity in the bottlenecked Australian population. It should not be confused with the 2006 identification study, or treated as a current assessment of individual animals. Nor does its subject establish that Pramono’s suggestion of adding animals to the Australian herd would necessarily help. Genetic identity and genetic variety are different considerations; a conservation plan would have to examine both.⁠²⁠⁷

The Australian costs are not hypothetical. The Northern Territory government says banteng grazing affects vegetation and their trampling damages sand-dune ecosystems and wetlands. Its information does not quantify those losses or establish particular native-species population outcomes. The evidence supports taking the damage seriously, without inflating it into claims the available monitoring does not demonstrate.⁠¹¹

Garig Gunak Barlu is a jointly managed national park. International interest in the cattle does not itself establish a new management decision, population target or change in animal-control policy. A proposal to preserve conservation value still has to fit responsibilities for the place where the animals live.⁠¹²

Daniel Ramp, director of the Centre for Compassionate Conservation, argues that Australia should consider the global status of introduced animals alongside its own conservation needs. His qualification is important: impacts on native threatened species should be mitigated. “At what point do we make this trade-off between balancing our conservation needs in Australia with those globally?” he asked ABC.⁠¹

That is a better question than treating “feral” and “endangered” as mutually exclusive labels. Banteng can be both an introduced pressure on Australian ecosystems and a potentially valuable population of a globally threatened species. Recognising one does not cancel the other.

Indonesia’s receiving landscapes would also need protection. Poaching, habitat loss and livestock competition threaten banteng there, while isolation exposes populations to risks from genetic drift—chance changes in genetic variation across generations. Sending animals back would not by itself resolve those pressures or demonstrate that a receiving site has enough secure habitat to sustain them.⁠²¹

The Northern Territory’s general wildlife-translocation guidance sets out proposal and permit requirements, but it is not evidence that a banteng-specific application has been made or approved. Administrative permission, animal suitability and ecological benefit would each need to be established—not assumed from the herd’s size.⁠¹⁴

Pramono has identified a potentially valuable resource, not a finished rescue plan. The strongest version of his proposal would protect neither herd nor habitat at the other’s expense: it would test whether Australian banteng can strengthen Indonesian recovery while reducing the damage they cause where they now live. The opportunity is real enough to investigate. Whether it can become effective conservation remains open.