Sub-Antarctic Macquarie Island has been the object of Australia’s most ambitious and expensive eradication program ending in 2014, with cats, rats, mice and rabbits eradicated. This project will examine different aspects of species and ecosystem recovery on the island following the eradication program, including vegetation, invertebrates, threatened burrowing petrels and a native predator, the brown skua. By quantifying the benefits and impacts of the eradication, the lessons learned from our research will form important guidance for future island eradication programs in Australia and world-wide.