It's a technique they've used before, back in 2010, with the aptly named "Piwi the kiwi":North Island brown kiwis are the most common species of kiwi, but even so, their numbers are dwindling.The greatest threat kiwis face isn’t traps (or body image issues from fitness-focused heroes like Ruata) – it’s mammals, particularly domestic pets.The sudden introduction of predators like dogs, cats and ferrets along with humans, so late in the evolution of the kiwis, meant that the ground-dwelling birds lacked the necessary defences to avoid becoming lunch.Along with nest protection and captive breeding projects, controlling predators with leg-hold traps is one of the main techniques being used to safeguard kiwis.Although a lot of effort goes into ensuring that the traps are as kiwi-proof as possible, conservation isn’t always perfect, especially in the fight against invasive species."