Predation determines the outcome of 10 reintroduction attempts in arid South Australia

► We attempted nine mammal and one reptile reintroduction in northern South Australia. ► 50% of reintroductions failed due to predation. ► Release size, source populations and use of a release pen had little effect. ► Predation thresholds should be developed for threatened species. ► Feral cat control is urgently needed to improve reintroduction success.