| Columbian sharp-tailed grouse (Tympanuchus phasianellus columbianus; CSTG)historically were abundant throughout the westernUnited States,but now occupy ≤ 10% of their historic range. Since 1987, there have been ≥16 CSTG translocation projects attempting to restore populations within historic habitat, but only 50% were considered to have a ‘moderate’ or ‘high’ probability of success.I reintroduced CSTG to northcentralNevada from 2013 –2017 as a species conservation project, andI estimated survivorship and reproduction by translocated individuals. I used integrated population models (IPMs) to predict population persistence, and I measured genetic paternity using tissue from hatched eggs to better elucidate breeding patterns by translocated individuals. Translocated yearling CSTG survived substantially better than did adults during the first three years of the reintroduction, while adults survived better than yearlings during the final two years. Survival of nests by translocated females was best predicted by dense herbaceous cover, with tall perennial forbs and tall shrubs increasing nest survival probabilities. Once hatched, chicks reared by translocatedyearling females exhibited substantially higher survival probabilities than did chicks reared by adults. Despite overall low estimates of survival and reproduction by translocated individuals, I observed annual increases in population sizeand estimated rates of population growth could not be explained by demographic estimates of translocated individuals alone. Via use of informative priors in anIPM, I found statistical evidence that non-monitored offspring hatched in Nevada exhibited demographic vital rates similar to non-translocated resident populations and constituted the core of the expanding population. Therefore, management of future translocation projects should consider actions which maximize the production and survival of native offspring rather than focusing solely on the performance of translocated individuals. Finally, I measured the genetic parentage of collected clutches laid by translocated female CSTG to explore patterns in post-release breeding. Paternity could be assigned to 62% of collected eggs, and 98.4% of those assignments were attributed to adult males which had survived for ≥ 1 year in Nevada before siring the offspring I measured. That is, translocated males that survived for ≥ 1 year went on to sire a majority of nests that I sampled. Key words: Artificial insemination, brood survival, Columbian sharp-tailed grouse, genetic paternity, habitat selection, integrated population model, nest survival, Nevada, population restoration, survival, translocation, Tympanuchus phasianellus columbianus, |