Wildlife Corridors for Mammals: Connecting Habitats and Improving Welfare

Wildlife corridors connect fragmented habitats, enabling animals to move, find mates and access seasonal resources. They directly improve the welfare of individual mammals as well as population viability.

Key Facts

Habitat fragmentation forces mammals into smaller areas with reduced food availability, increased inbreeding, higher predation pressure and more frequent road collisions — all welfare costs
Wildlife overpasses and underpasses reduce road kill mortality by 70-95% for species that adopt them, directly preventing acute welfare harms to individual animals
Research on mountain lions in California shows that freeway fragmentation prevents genetic exchange between populations, leading to inbreeding depression and reduced fitness
Hedgerow networks, riparian corridors and urban green connections function as mammal corridors at local scales — their welfare benefits are measurable through reduced road kill and increased home range use
UK wildlife corridors including the proposed Wild Kennett to Solent and other landscape-scale connections aim to provide movement routes for species including deer, badgers, polecats and otters

Welfare Considerations

Wildlife corridors address welfare at the landscape scale — they are infrastructure investments that prevent the chronic welfare harms of habitat isolation. Inbred populations with reduced immune function and fitness, animals trapped in small areas with insufficient food, and the constant risk of road mortality for corridor-crossing animals are all welfare problems that corridors address. At local scale, garden connectivity — removing or opening fences, planting hedges, creating log piles — aggregates to meaningful corridor function for small mammals and amphibians. At landscape scale, advocacy for corridor planning in land use policy is high-impact welfare work.

What You Can Do

Create or improve wildlife connectivity in your garden — hedgehog highways, log piles and pond edges connect local wildlife habitats
Support Rewilding Britain, Wildlife Trusts and National Highways initiatives to establish wildlife corridors and crossing structures
Advocate for wildlife corridor requirements to be included in planning policy for new roads and developments
Drive carefully in areas where corridors cross roads — dawn, dusk and wet nights are peak mammal movement times
Learn about the mammal species that use corridors in your area and the organisations monitoring their movement