The corncrake has declined catastrophically across Britain and Ireland due to changes in hay cutting practices and now survives mainly in the Western Isles and parts of western Ireland.
Mechanised hay cutting kills corncrakes, their eggs and chicks when mowing proceeds from the field edge inward, trapping birds in diminishing central areas. Cutting from the centre outward allows escape. Early cutting timing before nesting completion eliminates clutches. Welfare and population recovery depends on farmer participation in late-cutting and corncrake-friendly mowing schemes.