GS3 Ryegrass seed-set as winter food for birds is a Countryside Stewardship grassland option where a permanent ryegrass sward is managed to allow seed heads to set and persist into winter. The retained ryegrass seed provides a valuable food source for farmland birds during autumn and early winter, helping support bird populations and improve biodiversity. Management typically involves limiting grazing or cutting at key times so that seed heads develop and are available for birds as natural winter food.