A stoat was found dead on New Zealand’s Oruawairua Island, likely swam from nearby Arapaoa Island, triggering a major biosecurity response to protect endangered birds.

A stoat was detected on Oruawairua/Blumine Island, a predator-free sanctuary in New Zealand’s Marlborough Sounds, likely swimming from nearby Arapaoa Island 400 meters away. Captured on camera in July and confirmed in August, the animal was found dead in a trap, prompting a rapid response from the Department of Conservation (DOC). The island, home to endangered species like the kākāriki karaka parakeet and mohua, relies on a trapping network and surveillance to prevent predator establishment. DOC emphasized that even one stoat poses a serious threat to vulnerable wildlife, especially birds nesting in tree holes. Additional trail cameras, tracking tunnels, and a detection dog were deployed to ensure no others remain. Visitors are urged to clean gear and boats thoroughly to prevent accidental introductions, as the island remains open but requires strict biosecurity measures.