Habitat fragmentation is one of the leading drivers of wildlife decline, and corridor connectivity reduces individual animal welfare costs of navigating fragmented landscapes.
Habitat fragmentation causes welfare harm at both individual and population levels. Individual animals attempting to move through fragmented landscapes face elevated road mortality, exhaustion from extended travel through unsuitable habitat, and territorial conflict at population edges. At the population level, fragmentation reduces genetic diversity and population resilience, increasing extinction risk. Corridor creation addresses both individual welfare costs of landscape navigation and population-level consequences of genetic isolation. The cost-effectiveness of wildlife corridors compared to other conservation investments is strong when interventions are targeted at genuine connectivity bottlenecks.