Natural Recolonization of the Eurasian Otter (Lutra lutra) in Massif Central (France)

The natural expansion of otter populations from thier stronghold in the Massif Central was followed over four decades, with regular monitoring. In this area, many of the watersheds between drainage basins are themselves wetlands, and otters were able to overcome many natural barriers such as dams, by crossing these watersheds. This, along with conservation of riparian corridors, has facilitated otter recovery. The connections between wetlands and watersheds is as important as the linear routes along watercourses