The Corsican red deer, Cervus elaphus corsicanus, has been extirpated from Corsica by 1970, when the Sardinian population was below 250 individuals. An action plan to conserve this critically endangered subspecies was then agreed by both Sardinian and Corsican authorities. The choice of reintroducing Sardinian deer in Corsica relied on past descriptions and historic data suggesting a joint origin in the two Mediterranean islands. Initiated by the Natural Regional Park of Corsica (PNRC), the reintroduction was supported by several environmental authorities such as the Regional Direction of Environment (DIREN), the Environment Bureau of Corsica (OEC), the National Game and Wildlife Office (ONCFS), the National Forest Office (ONF),… Since the transfers of animals from Sardinia (1985, 1987, 1994), the Corsican population of deer has been regularly increasing in three large captive breeding enclosures: Quenza, Casabianda et Ania di Fium’Orbu. Three localities were chosen by the PNRC team for the first reintroduction attempts in the wild: Quenza in 1998 and 2002, Chisà in 1999, and Santo Pietro di Venaco in 2004. After each release some individuals were radiotracked, and then wild populations are regularly monitored; in 2005 ca. 200 Corsican red deer were estimated to live in the wild in Corsica.