Wildlife corridors connecting fragmented habitats are essential for maintaining healthy animal populations and preventing the welfare consequences of habitat isolation.
Wildlife corridor welfare operates at two scales: individual animals attempting to move through fragmented landscapes, and population-level consequences of isolation. An individual badger or pine marten attempting to cross a motorway faces both the risk of road death and the physiological stress of navigating human-dominated landscapes. At the population level, isolated groups experience inbreeding effects that increase disease susceptibility and developmental abnormalities - welfare consequences that play out across generations. Wildlife corridors that reduce these pressures have direct individual welfare benefits through reducing road mortality and indirect benefits through maintaining the genetic diversity that underpins population health. Corridor conservation is therefore simultaneously a conservation and a welfare investment.