Controlling feral cats on biodiversity-rich islands is a high priority for the conservation of Australia’s biodiversity. This project will document the benefits of the proposed Kangaroo Island cat eradication program on the Kangaroo Island dunnart and other threatened species. As its name implies, the Kangaroo Island dunnart is an endemic species restricted to Kangaroo Island. It is a mouse-sized carnivorous marsupial (a dasyurid) and little is known of its current status, ecology or threats. This project will use a wide range of sampling methods to fill many of these knowledge gaps, and then provide a reporting framework that can be used to assess recovery associated with feral cat control.