Since 2007, we have carried out a program to reintroduce roe deer in the South of the Douro River region, an area where the presence of this cervid was vestigial or non-existent, with the aim of increasing the number and variety of prey available to the Iberian wolf, to reduce the impacts of predation on livestock herds. Throughout the project we developed several actions to establish a roe deer population in the South of the Douro River region. We are currently monitoring this population in the intervention area to assess its sustainability.