Wildlife Welfare

Pine Marten Welfare and Reintroduction

The welfare and conservation story of pine marten recovery — and their unexpected role in grey squirrel suppression.

Key Facts

Pine martens (Martes martes) were largely confined to Scotland by the 20th century following persecution
Reintroduction programmes in Wales and England are re-establishing populations
Pine martens preferentially predate grey squirrels over red squirrels in areas where they co-exist
Their recovery appears to benefit red squirrel populations through competitive suppression of grey squirrels
Pine martens are legally protected — killing or disturbing them is a criminal offence

Welfare Considerations

Pine marten welfare and conservation represent a positive story of natural recovery and deliberate reintroduction. Individual pine martens are wide-ranging, territorial predators with complex habitat needs — mature woodland with den sites, diverse prey communities, and large home ranges. Fragmented woodland landscapes limit population establishment and increase exposure to road mortality.

The discovery that pine marten recovery suppresses grey squirrel populations — and indirectly benefits red squirrels — has transformed conservation thinking. Grey squirrels appear more vulnerable to pine marten predation because they spend more time on the ground (lacking the red squirrel's arboreal agility). This natural suppression mechanism has welfare implications for both squirrel species and the predator-prey dynamic.

Individual marten welfare challenges include road mortality, illegal persecution (snaring and shooting in game management areas), and secondary poisoning from rodenticides. Monitoring and legal protection are essential to support population recovery.

What You Can Do

Support pine marten reintroduction programmes in Wales and England
Report pine marten sightings to local recording groups to support monitoring
Never disturb, trap, or harm pine martens — they are fully protected
Support campaigns to eliminate illegal raptor and mustelid persecution in game management areas
Welcome pine martens in woodland areas as a natural pest control mechanism benefiting red squirrels