This chapter examines the role of zoos in the reintroduction of threatened animals into the wild. Zoos are increasingly involved with reintroduction projects and in-situ conservation. Once a sufficient number of animals have been bred in cooperative breeding programmes, appropriate individuals may be selected for release, and trained to avoid predators and find food and shelter to increase their post-release survival rates. After release they should be monitored for disease and so that survival rates may be determined. In-situ conservation projects may involve zoos providing overseas partners with expertise, training, community education, equipment, funding and other resources to support them in protecting indigenous species and ecosystems. Zoos have played an important role in the recovery of some species by breeding animals for release or providing expertise and other resources to facilitate reintroductions. Many zoos have made significant contributions to in-situ projects to protect threatened species and habitats.