Non-Lethal Doesn’t Mean Humane
I love Australian animals deeply. They're part of my identity and culture. And yes, when it comes to choosing between protecting native wildlife and allowing invasive animals like feral cats to destroy it, I unashamedly put Australian wildlife first.
Australian animals and plants belong to here to this Country. And they're deeply woven into our identity, Aboriginal and non-Aboriginal Aussies alike. We put a kangaroo on Qantas aircraft and call our rugby team the Wallabies for a reason. That connection carries a special responsibility to protect them. It doesn’t excuse cruelty to introduced animals, but it does mean making difficult choices so our native species survive.
As someone dedicated to caring for Country and Australia's former Threatened Species Commissioner, I've confronted the harsh reality: protecting Australia’s environment requires killing invasive species. That includes removing invasive plants and animals that destroy habitat or prey on our wildlife. Nobody has to enjoy this work to recognise its necessity. I certainly don't. But caring for Country requires us to face the consequences of our decisions, including decisions not to act.
CSIRO identifies invasive species as the major historical cause of Australia's native animal and plant extinctions to date Feral cats alone have contributed to the extinction of more than 20 Australian mammal species. Yes, habitat destruction and climate change also demand urgent action. But their importance doesn't make invasive species optional. Indeed, it makes it even more urgent. If we're serious about climate adaptation, we need to get invasive species threat under control to give our wildlife the best possible chance of survival.
Rejecting effective lethal control doesn't remove suffering from the landscape. It leaves Australian species exposed to on-going introduced harm.
The suffering hidden behind “non-lethal”
Trap, neuter, return might sound compassionate. Capture a cat, desex it and release it back into the environment alive. But that description leaves important things out. Feral cats are wild animals. They're unused to people, capture, confinement, transport and handling - all of which cause considerable stress. Surgery requires anaesthesia, pain relief and recovery care. These impacts matter, even when skilled veterinary care minimises them.
Then comes release. The cat can't reproduce, but it can still hunt and kill for the rest of its life. Australia’s feral-cat threat abatement plan explicitly recognises that trap-neuter-release doesn't stop individual cats hunting wildlife or spreading disease, and is ineffective at reducing overall populations or impacts. A sterilised predator can continue killing for years while conservation managers wait for population numbers to fall. And Australia has millions of feral cats. Seriously, how could they all be caught, neutered and released or rehomed?
And on the idea of rehoming, we need to remember that feral animals have made the Bush their home. Feral animals are wild animals. They don't want to live as domesticated pets. Putting wild animals into captivity is cruel.
What I mean by “net humaneness”
While we should always consider the suffering caused by feral animal control measures, we should also consider the suffering it prevents. I think of this as net humaneness.
Consider a fox or cat control program using 1080. The suffering caused by the poison is real. But the ethical assessment can't end with the fox or cat. It must also consider the native animals that would otherwise have been mauled and killed by the fox or cat, and their risks of extinction.
Lethal control measures, even 1080 where it is the most effective and justifiable measure, can still be ethically justified if credible evidence shows that they prevent greater harm, and no other feasible, less harmful approaches can deliver comparable protection.
Rabbits illustrate why net humaneness also extends beyond feral predators. Australia’s latest State of the Environment report identifies rabbits as a threat to over 320 nationally listed threatened species. The directly devour endangered plants and degrade habitat for native animals. High rabbit numbers also fuel feral cat and fox populations. So leaving rabbits uncontrolled is an environmental decision with consequences too.
Resources also have ethical consequences
Conservation budgets, ranger numbers, veterinary capacity and people’s time are limited. Capturing, transporting, sterilising and providing recovery care for millions of feral animals in Australia would demand substantial resources. Much more than control measures like shooting, baiting and Indigenous hunting which are all proven to be more cost effective. If a program costs more while delivering less protection than an available alternative, then we have to ask what else those resources could achieve.
Within conservation, the trade-off is direct: fewer resources for other threatened species, habitat restoration or Indigenous ranger work. Across public budgets more broadly, spending millions of dollars trapping, neutering and rehoming feral animals would need to be weighed up against spending that money on, say healthcare, education or public housing.
Government budgets are limited and opportunity costs are real. That doesn't automatically make the cheapest method the most ethical. Cost doesn't excuse unnecessary cruelty. But it does mean we have to justify expensive approaches through their conservation results, rather than through how reassuring they might sound. The sad reality is that non-lethal measures are almost always most expensive and least effective as a conservation measure.
Compassion requires responsibility
Being Green, an environmentalist or an animal lover should mean confronting these choices honestly. Australia has the worst extinction record for mammals in the world, with feral cats and foxes central to that loss.
We're kidding ourselves if we think compassion means catching and sterilising a feral predator and then releasing and allowing it to keep mauling and killing Aussie wildlife. That's turning a blind eye to the native Australian animals that suffer in its jaws and Australia's on-going extinction crisis. Trapping, neutering, releasing and rehoming are rarely, if ever, kinder alternatives. They prolong suffering, fail to protect wildlife and consume more resources than effective lethal control. Insisting on them is a choice with an ethical cost and humaneness impacts. Feeling better about a method doesn't make its consequences better.
Invasive species control should be based on evidence, not ideology. It should minimise suffering (including that of our native wildlife) and use the most effective, justifiable and humane methods available. The truth is that lethal control of invasive species is the most humane method of protection for Australia's wildlife. If we reject it, we're rejecting our native wildlife.
Compassion that refuses to confront those consequences is selective compassion. Australian animals pay for it with their lives.
Absolutely, feral animals must be culled. But not with poison baits, including 1080. Aside from the agonising death, this poison kills non-target wildlife species. Here is the list of native species that are highly sensitive to sodium fluroacetate (1080). Quolls, Koalas, Greater Gliders and Sugar Gliders, Platypuses and Eastern Grey Kangaroos; Echidnas are also at risk. So, it is erroneous to claim that all native species have developed tolerance to sodium fluroacetate, simply because some native plants contain this toxic substance.
Animal Justice Party and Animal Liberation are opposed to lethal control methods on account of the cruelty to the targeted species plus secondary victims,ie animals that consume the DDT affected animal will also die.
For the benefit of those of unfamiliar with '1080' (pronounced "ten eighty"): This is the common name for sodium fluoroacetate, a highly toxic, naturally occurring compound found in native Australian plants like the Gastrolobium genus. It is primarily used in lethal baiting programs to control invasive predators such as feral cats, red foxes, wild dogs, and rabbits, thereby protecting Australia’s unique native wildlife and livestock from predation and agricultural damage.
The poison is effective because many native Australian species have evolved a natural tolerance to it through co-evolution with these toxic plants, whereas introduced predators lack this resistance. Eradicat® is a specific, registered bait product containing 4.5mg of 1080 designed for feral cats, while dried meat baits with lower concentrations are often used for foxes.
Well said Gregory. The idea that trapping, neutering and releasing or rehoming feral animals is more 'humane' is naïve and ideologically based, rather than truly compassionate. Caring for Country in places like Australia that are overrun with feral animals and plants isn't easy. But controlling the ferals is the right thing to do.