Australia has already lost many mammal species to extinction. Dramatic and continuing declines of mammals across northern Australia mean that more species could be lost in the near future. There is still time to reverse these declines but this will depend on a clear understanding of what is causing them. The project will use landscape-scale experiments to discover the factors that threaten mammals in northern Australia focusing on predation by cats and its interactions with fire and grazing. We will provide knowledge to prevent extinctions and implement management for recovery.