The capercaillie is Scotland's largest bird and among its most endangered, with welfare impacts from human disturbance and habitat fragmentation threatening the remaining population.
Capercaillie welfare is inextricably linked to disturbance management. Flush events during lekking cause significant energetic costs - the birds expend substantial energy that should be devoted to reproduction. Repeated disturbance over a season can cause complete breeding failure. During winter, energy budgets are tight and repeated flush from feeding areas causes additional thermal and energetic stress. The species' precarious population means each individual's welfare and reproductive success matters enormously for species survival. Seasonal access restrictions to core capercaillie areas represent one of the few cases where human access rights must be subordinated to wildlife welfare needs.