The Purerua-Mataroa peninsula to the north of the Bay of Islands is home to an estimated three thousand Northland brown kiwi. The Pest Free Purerua project aims to reduce predators numbers on the peninsula and defend its narrow neck from re-invasion. Working across a patchwork of landuse and landowners, the team are using AI traps and technology to help catch the remaining pests. But one feral cat continues to elude them, and the ongoing threat to kiwi from pet dogs is proving tricky to solve.