Merlin Welfare: UK Upland Moorland Breeding

The merlin is Britain's smallest falcon and one of its most vulnerable raptors. Its welfare on upland moorland depends on heather age structure, prey availability and freedom from disturbance.

Key Facts

UK merlin breeding numbers are approximately 1,300 pairs, with most on Scottish and Welsh moorland
Merlins require diverse heather age structure - old tall heather for nesting and short heather for hunting
Meadow pipits are the primary prey, requiring open moorland with abundant small passerine birds
The species has declined by 34% since 1995, reflecting upland habitat degradation
Merlin nests are on the ground in deep heather and are extremely sensitive to disturbance

Welfare Considerations

Merlins nesting in heather moorland subject to inappropriate management experience breeding failure from direct nest disturbance and indirect habitat degradation. Muirburn that removes tall heather used for nesting, or overgrazing that opens moorland excessively, reduces the structural diversity merlins require. Adults repeatedly flushed from nests by walkers, dogs or low-flying aircraft expend energy and expose eggs and chicks to temperature extremes. The high prey dependence on meadow pipits means that any factor reducing upland pipit populations directly affects merlin feeding success and chick provisioning.

What You Can Do

Support sensitive moorland management that maintains heather age structure suitable for merlins
Observe appropriate distances from upland birds during the breeding season
Report merlin sightings and breeding to county bird clubs to support population monitoring
Advocate for upland management prescriptions that benefit merlins in agri-environment schemes
Support moorland restoration that creates the structural diversity of heather habitat merlins require