As special professor in Rewilding Ecology, I study rewilding as a novel ecosystem restoration technique. World-wide steep declines in biodiversity call for large-scale ecosystem restoration. Rewilding is an ecosystem restoration technique aiming to provide room for natural processes to steer biodiversity recovery as much as possible. Rewilding involves the restoration of water and wind dynamics and reconnection of terrestrial, freshwater and marine habitats as well as the promotion of wildlife by reducing or stopping management and re-introducing key missing engineering native species. In my work, I study the outcomes of rewilding for wildlife, biodiversity and ecosystem services as well as the effect of wildlife itself on ecosystem restoration.