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Life‐history traits and the fate of translocated populations

Attempts to identify predictors and mechanisms of invasion success have been weakened by poor data quality, mostly because monitoring does not begin immediately after introduction events. To overcome this issue, we used data from conservation translocations of threatened bird species. We analyzed information on >1200 translocation events of >150 bird species to investigate how life‐history traits affect population establishment measured based on rates of survival and reproduction. Species position along the slow–fast life‐history continuum was a key predictor of translocation success. Species with fast‐paced life histories were less likely to survive (over both short‐ and mid‐term) and more likely to breed successfully than species with slow life histories. The temporal partitioning of reproductive effort (number of clutches per year) also affected the probability of successful reproduction. Our results illustrate how conservation‐motivated reintroduction programs can provide proxies for the initial stages of the invasion process, enabling empirical tests of predictions from life‐history theory and informing management.