How to identify

The largest of the harriers, the Marsh Harrier can be recognised by its long tail and light flight with wings held in a shallow 'V'. It is distinguishable from other harriers by its larger size, heavier build, broader wings and absence of white on the rump. Females are larger than males and have obvious creamy heads. Its future in the UK is now more secure than at any time during the last century, but historical declines and subsequent recovery means it is an Amber List species. Marsh Harriers are a Schedule 1 listed bird on The Wildlife and Countryside Act.

Call

Marsh Harrier

Patrik Åberg / xeno-canto

Key features to look out for

  • Larger and stockier than a Hen Harrier, with broader wings 
  • Females are a rich chocolate brown, with creamy patches on the throat and crown of the head. Juveniles look very similar  
  • Males are brown above and chestnut underneath 
  • Males have tri-colour wings: brown closest to the body, then grey, finishing with black wing tips 
  • Both males and females lack the white rump of a Hen Harrier 
  • Yellow legs 
Female Marsh Harrier, in low flight over a nesting site.
Marsh Harrier
What’s that bird of prey

From tiny Merlins to enormous White-tailed Eagles, the UK’s birds of prey come in all shapes and sizes. These masterful predators are a real treat to see, but they’re often super-fast and many species look quite similar, which can make identifying them a challenge. In this guide, we share some simple ID tips to help you.

Where to see them

As their name suggests, Marsh Harriers are birds of marshes and reedbeds. They also hunt and nest in farmland and the open countryside. They can mostly be found in East Anglia, Somerset and the south-east, as well as north-west England and parts of Wales and Scotland.

Key

  1. Resident
  2. Passage
  3. Summer
  4. Winter
* This map is intended as a guide. It shows general distribution rather than detailed, localised populations.
  1. Jan
  2. Feb
  3. Mar
  4. Apr
  5. May
  6. Jun
  7. Jul
  8. Aug
  9. Sep
  10. Oct
  11. Nov
  12. Dec

Where best to see them

Marsh Harrier, adult male bringing in nesting material to reedbed nest
Behaviour

You might see Marsh Harriers flying low over reedbeds, before dropping down to catch their prey of small birds, rodents and even frogs. Like Hen Harriers, male Marsh Harriers perform an impressive sky dance in spring, tumbling towards the ground before swooping back up. Sometimes a female will join in, flipping herself upside down and locking talons with the male in mid-air. Marsh Harriers also hold their wings in a distinctive ‘V’ shape while flying. 

Key facts