Hen harriers will begin their spectacular courtship sky dance in and around March but they remain one of the UK's most threatened birds of prey. Illegal persecution on upland intensive grouse moors is the most important threat to their survival. On this month's Nature's Voice Jane Markham meets Bea Ayling who manages the RSPB's Hen Harrier LIFE+ project about this remarkable bird and to Andre Farrar about his hopes for a new government backed hen harrier action plan.