Reintroduction of exterminated species in an area; it is bound to fail if the chosen animal became extinct in the area too long ago and if the area itself has undergone too many changes. Reintroduction needs years of careful planning - the approval of local population, technical conditions of the release, feeding system, protection and breeding control - and even then some unexpected problems may arise. (Source: GEMET/WPR)

Species reintroduction is the deliberate release of a species into the wild, from captivity or other areas where the animal survives. A species that needs reintroduction is usually one whose existence has become threatened or endangered in the wild. (Source: Wikipedia/AMM)