Hen Harrier, Circus cyaneus, is a species of day-flying bird of prey found in grassland, heathland and shrub and wetland ecosystems.

Circus cyaneus has a breeding population size of 9200-13300 breeding females and a breeding range size of 830000 square kilometres in the EU27. The breeding population trend in the EU27 is Decreasing in the short term and Increasing in the long term.

The EU population status of Circus cyaneus was assessed as Secure, because the species does not meet any of the IUCN Red List criteria for threatened or Near Threatened, or the criteria for Depleted or Declining (the EU27 population or range has not declined by 20% or more since 1980).