Wildlife corridor design is an evidence-based science, with corridor width, vegetation structure, and connectivity to source populations determining effectiveness for different species.
Wildlife corridor welfare function depends on whether corridors actually enable the movement of target species between habitat patches. Poorly designed corridors — too narrow, wrong vegetation, inappropriate structure — provide no connectivity benefit while falsely reassuring planners that wildlife needs have been addressed. Evidence-based corridor design requires species-specific knowledge of movement ecology, minimum habitat requirements, and the specific barriers being bridged. Post-implementation monitoring with GPS tracking or camera traps validates whether corridors achieve their wildlife welfare function.