Source: Department of Conservation
What the next 20 years of predator free islands hold.
In this two-part series, we’re celebrating 20 years of Aotearoa New Zealand’s largest predator free project to-date. Looking to the future, we explore what the next 20 years of restoring New Zealand’s wild and precious islands may hold. Learn how artificial intelligence, the history of phones, and feral pigs all connect.
Written by Janel Hull.
20 years ago, DOC declared the seemingly impossible operation to make Campbell Island predator free a resounding success.
The techniques that DOC staff on Campbell Island/Motu Ihupuku pioneered helped propel the world into exponentially scaling up eradications of bigger and bigger islands. DOC’s Predator Free 2050 Senior Manager, Brent Beaven, shares how Campbell Island changed the game. “Campbell Island helped unlock a step change in what we thought was possible.”
Now, there have been over 1,000 island eradications in the world. And New Zealand is responsible for the lion’s share.
Thanks to these predator free breakthroughs, islands across the world are covered in screeching penguins, soaring albatross, and chubby sea lions. We were able to save precious native plants and animals from the brink of extinction.
But momentum in creating larger predator free islands has unfortunately waned. Brent notes, “The island eradication tools and techniques we use now have allowed us to achieve some incredible things. But, to scale up to larger and more island eradications, we need innovation.”
Technology and techniques haven’t changed much since the 2001 Campbell Island operation. Island eradications in 2023 use similar GPS, helicopters, and techniques. Which is surprising considering that in 2001 the first ipod was released, we had just survived Y2K, and fax machines and landlines reigned supreme. These predator eradication techniques are tried and true and get the job done. But the tools aren’t effective and efficient for eradicating predators from very large islands or the mainland of Aotearoa.
To tackle restoring larger islands and the mainland, we need new tools, techniques, and technology. We need investment to shift from reliable landlines to transformative smart phones.
Predator Free 2050 has focused government investment into this innovation. Since the goal was announced in 2016, programmes like DOC’s ‘Tools to Market‘ and Predator Free 2050 Ltd.’s ‘Products to Projects’ have invested in possible game changers like biodegradable aerial rat traps, AI cameras and image recognition, smart detection devices, pest-specific toxins, and research to map predator genomes to understand their unique weaknesses and biology. In just the first five years of Predator Free 2050, government has invested $43 million into tools, research, and software for predator eradication.
It’s unlikely research will uncover just one “silver bullet” for eradicating introduced predators. But with the help of investment and new tools and technology, Aotearoa could accelerate efforts to restoring precious islands and our mainland.
Predator Free 2050 has also helped launch DOC’s National Eradication Team (NET). This team is working on a strategy for eradicating predators from all of New Zealand’s uninhabited off-shore islands. They’re leaders in predator eradication – spearheading strategy, testing new techniques, and advising on island eradication projects both in Aotearoa and around the world.
DOC’s eradication experts have already achieved great things for people and wildlife. In 2018, a DOC team led the charge to successfully eradicate mice from Antipodes island, protecting wildlife like wandering albatross.
They’re also sharing their knowledge and expertise abroad. In 2023, they led a rat eradication on Palmerston Atoll in the Cook Islands with our neighbours in the Pacific who were struggling with rats destroying food and threatening their community’s health.
With the leadership of DOC and investment in tools and techniques, Aotearoa is taking strides to accelerate island conservation.
And these experts have their eyes set on the next big island restoration – Maukahuka Auckland Island.
Maukahuka/Auckland Island is a stronghold of remarkable plants and animals. As a subantarctic nature reserve and World Heritage site, it is home to some of the world’s rarest animals like the Gibson’s albatross, southern right-whales, New Zealand sea lions and hoiho (yellow-eyed penguin).
The island supports over 500 native plants and animals with more than 100 found nowhere else in the world. The wild landscape has blushing rātā forests and windswept clusters of bright megaherbs. Maukahuka is of great cultural and spiritual significance to Ngāi Tahu, with a long history of Polynesian expeditions to the islands to gather food and settle.
Sadly, over the last 200 years, populations of feral pigs, feral cats, and mice have inflicted severe harm. Now, of the 39 native bird species that were once on the island, 28 are either gone or remain in very small numbers. Large swaths of rātā forests have disturbed soils and stunted understories. Megaherbs are dwindling. Without action, plants and animals will continue to disappear.
At about four times the size of Campbell Island, achieving a predator free Auckland Island would be a massive undertaking. It would be New Zealand’s largest predator free island and the final step to finally restore all of New Zealand’s subantarctic islands.
In 2021, the National Eradication Team spent three years investigating whether it was possible to eradicate pigs, mice and feral cats from Auckland Island. They concluded that making Auckland Island predator free would be achievable, worthwhile, and sustainable in the long run.
But first, the project would need about $9.75 million per year over 8 years to tackle the challenge. Innovation in image processing and targeted baits has steadily reduced the time and cost. But it would still require unprecedented support and investment.
Looking to the future, New Zealand could make even bigger strides in conservation on islands like Auckland Island. Brent reflects, “All of our progress on previous islands helped build the confidence to launch Predator Free 2050. We’re now seriously eyeing up another step change in possibility with Maukahuka Auckland Island.”
Predator Free 2050 is helping tackle the challenge of innovating new tools and technology, spearheading a strategy for restoring all islands, and growing new levels of community support and investment for eradicating pests.
The next 20 years could be promising for predator free islands. But it’ll be a challenge. Brent notes, “We’ll need to innovate, test our limits and be prepared to take a bit of risk as we step into the unknown.”
