Eastern Marsh Harrier vs Hen Harrier

In short

The Eastern Marsh Harrier and Hen Harrier can be distinguished by their structure and plumage. The Eastern Marsh Harrier is bulkier with broader wings, while the Hen Harrier is slimmer with more pointed wings. Plumage differences are subtle but notable, especially in males, where the Eastern Marsh Harrier shows more contrast in its plumage.

Identification tips

1. Structure: Look for the broader wings and bulkier build of the Eastern Marsh Harrier. 2. Plumage: Note the contrasting plumage of male Eastern Marsh Harriers versus the more uniform grey of male Hen Harriers. 3. Habitat: Consider the habitat; Eastern Marsh Harriers are more likely in wetland areas. 4. Flight Style: Observe the flight; Eastern Marsh Harriers have a more buoyant flight compared to the steadier Hen Harrier.

Size

The Eastern Marsh Harrier is generally larger and bulkier than the Hen Harrier, with broader wings and a heavier build.

Plumage

Male Eastern Marsh Harriers have more contrasting plumage with darker upperparts and a white rump, while male Hen Harriers are paler with a more uniform grey appearance. Females and juveniles of both species are brown but the Eastern Marsh Harrier tends to have a more pronounced facial pattern.

Behaviour

Both species hunt by flying low over open fields, but the Eastern Marsh Harrier often shows a more buoyant flight style compared to the Hen Harrier's steadier flight.

Habitat

Eastern Marsh Harriers are typically found in wetlands and marshes, whereas Hen Harriers prefer open moorlands and grasslands, though both can overlap in some areas.

Voice

Vocalizations are not a reliable field mark as both species are generally silent outside of the breeding season.