Hen harriers are one of England's rarest breeding birds, with populations suppressed by illegal persecution on driven grouse moors. Protection is a major welfare and legal priority.
Hen harriers killed through illegal persecution suffer acute welfare harm. Nests destroyed by persecution deprive adult birds of breeding investment and cause death of eggs and chicks. The legal requirement to protect Schedule 1 species is not being met in many areas. Effective enforcement against persecution is an urgent welfare and conservation priority.