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Clever drone technology being developed to aid predator eradication

A drone in flight. Image credit: Craig Morley

Imagine a land humming with birds, crawling with lizards, and lush with native plants. This is the vision that gets conservation workers and volunteers out the door.

Unfortunately, current methods of predator eradication are not 100 percent effective.  Applying 1080 over large areas requires large buffer zones to avoid waterways, wāhi tapu, and private land.

These zones become havens for the remaining introduced predators. Uncontrolled, they breed and repopulate the surrounding areas.

Using drone technology

How do you get to areas to achieve 100 percent eradication?

With some new technology and new ways of thinking.

Craig Morley Associate Professor of Resource Management at the Rotorua Institute of Technology has dedicated his life to predator control.

He says he “got keen on drones” back in 2013, when he started thinking about what drones could offer the predator free movement.

“I’ve witnessed first-hand the challenges of trying to deliver toxins via trekking into remote places. You need to cut or maintain tracks – often there’s some risk to people’s safety in difficult terrain.

“And frustratingly, the tracks you cut can aid introduced predators in navigating the bush.

“What’s more, while broad toxin baiting and trapping are excellent knock-down strategies, getting to eradication is very, very challenging with these strategies alone – thanks to the buffer zones they require.

Drones offered a way to neatly solve both problems. But only if the tech is precise and effective,” he says.


Looking for partners to help him develop the technology needed, he came across X-craft.

Craig approached Philip Solaris Chief Executive of X-Craft about his ‘crazy idea’ to use drones to control predators in tricky terrain.

AGMARDT and Toi Ohomai provided the initial seed funding. And they teamed up with Napier based Aerospread Technologies to develop an exciting new predator control drone that takes precision to a new level.

Not your average drones

So what makes their drones different?

The duo’s drones are all about accuracy. With carefully programmed flight paths, the drones can navigate complex waterways, dense bush, and steep ravines – all the areas currently too tricky or too time consuming to manage.

The drones use a sophisticated guidance system capable of pinpoint deployment to hit targets within a few metres, anywhere at any time.

This is done by linking the drones’ autopilot system with GPS positioning using Global Navigation Satellite System-aided technology as well as other computer-based calculations.

Philip says, “Anyone can drop things from a drone. But it’s the accuracy on the ground – where the target is – that counts. Achieving this accuracy isn’t as easy as it sounds.”

To further this precision, the drones drop bait in a contained fashion, using edible (and tasty) biodegradable pods that break open when they hit the ground. Even in the thickest tangle of bush, the pods land within 0-2.5 metres of their target.

They’re cost and time effective too – they can drop 120+ bait pods in three hours. No terrain is out of reach. The drones are easy to transport and can take off from pretty much anywhere.

A drone being set up. Image credit: Craig Morley

So far, they’ve tested their drones in trial sites with excellent results. Because the drops are all GPS located, it’s easy to do follow up surveys on the ground to see if the bait pods have been eaten.

The team found confirmed declines in possum and rodent numbers in the trial sites.

Data is power

While the precision bait drops are a key part of their design, Craig and Philip have further ambitions.

Precise drops mean that precise data is also within reach. To collect this data, they’re developing sensor pods that could be dropped at the same time as bait or independently.

Much like the bait pods, the sensor pods are specially designed to attract introduced predators – by using biodegradable materials that are irresistible to their target species.

The sensor pods use artificial intelligence to make sense of the sounds and movements around them.

Craig says,

Each animal has a different signature.”


This programming allows them to locate areas of high – or no – activity. They can also tell which type of animals are where.

Drones fly over the pods and hoover up the data, creating valuable maps and information for future bait drops.

“Data is power,” Philip says. “And it’s really the only way to quantify the effectiveness of what you’re doing.”

While the sensor technology is still in the research and development stage, Craig and Philip hope to have it up and running soon.

In the future, they believe sensor pods will be limited to areas of high activity, making the process more efficient and reducing the number of baits needed.

The system could be scaled up or down to suit different projects in different areas – or adapted to focus on different predator species. Craig and Philip are both excited about the possibilities the sensor pods would open up for research and development.

The system might sound complex, but it could make controlling introduced predators much simpler. “The key is to reliably collect robust, accurate data,” Philip says. “Because the ability to accelerate your effectiveness grows with the knowledge you’re gaining.”

Want to help?

Craig and Philip believe the meticulous precision of their drones could hasten the Predator Free 2050 vision and are looking for partners to support their mission. They also need groups to run trials with interested predator control groups.

If you’re keen to get involved, contact Craig at [email protected]

With the right backing, they could be ready to take off within a year. These drones could plug the gaps that’ll bring the birdcall back.

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For more information:

Predator Free NZ Trust


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