The pine marten has recovered in Scotland and is gradually expanding into northern England and Wales, raising both conservation and welfare management questions.
Translocation of pine martens for reintroduction involves capture, handling, health checks, transport, and release, each carrying welfare costs. Well-managed translocations minimise stress through rapid handling, appropriate transport conditions, and soft release at suitable sites. Expanding populations face welfare threats from traffic mortality, accidental trapping, and persecution. Individual martens struck by vehicles but surviving frequently arrive at wildlife hospitals with internal injuries. The conservation benefit of marten recovery for ecosystem health and red squirrel welfare must be weighed against welfare costs imposed during management interventions.