Pine marten recovery in England and Wales through reintroduction has welfare implications both for individual animals and for their ecological impact on red squirrel-grey squirrel dynamics.
Reintroduction programmes involve careful welfare management of individual animals through health screening, transport, and soft release in suitable habitat. Road mortality is a significant welfare risk for reintroduced animals in unfamiliar territories. Illegal persecution remains a concern that must be monitored. The ecological benefit of recovering a lost species enriches the welfare landscape for multiple species.