The Hebridean machair — a unique coastal grassland ecosystem supporting crofting agriculture — is the most important UK stronghold for the corncrake. The traditional low-intensity crofting system with late hay cutting has maintained corncrake populations where intensive agriculture has eliminated them elsewhere.
Corncrakes on Hebridean machair are protected by the coincidence of traditional crofting practice and the species' breeding requirements. When economic pressure incentivises earlier cutting or abandonment of crofting, corncrake nesting habitat collapses and individual welfare harms — chick and adult mortality from machinery — increase immediately. Welfare monitoring during recovery phases tracks calling male numbers as a proxy for breeding success, with individual welfare implications inferred from population trajectories. Agri-environment payments that maintain crofting are the most effective welfare intervention available for this species.