The hen harrier is England most persecuted bird of prey, driven to functional extinction as an English breeding species by illegal killing on grouse moors, making its welfare the most acute raptor conservation crisis in Britain.
Hen harrier welfare is catastrophically compromised by illegal killing that has virtually eliminated the English breeding population. Individual birds tracked by satellite have disappeared over grouse moors, their fates unknown. Surviving birds face chronic stress in landscapes where humans pose a persistent threat. The systematic and ongoing nature of persecution despite full legal protection represents one of the most serious wildlife crime situations in British conservation history.