Wildlife

UK Barn Owl Conservation: Nest Box Schemes and Population Recovery

Barn owls have declined significantly in the UK due to agricultural intensification, but targeted conservation through nest box provision and habitat management has achieved real population gains.

Key Facts

UK barn owl population fell by over 70% during the 20th century due to habitat and prey loss
Nest box schemes have significantly increased breeding density in many areas
A healthy pair of barn owls consumes over 1,000 voles per year
Short-tailed voles are the primary prey item and vole population cycles drive owl breeding
Rodenticides used on farms can cause secondary poisoning of barn owls
The Barn Owl Trust estimates the UK population at 4,000-9,000 breeding pairs

Welfare Considerations

Barn owls in areas without suitable nest sites are limited in their ability to breed successfully, reducing population fitness and resilience. Secondary poisoning from rodenticides causes a slow and distressing death as anticoagulants prevent blood clotting. Each individual owl that dies from rodenticide poisoning represents a preventable welfare failure. Nest box provision and rodenticide-free management are complementary welfare and conservation interventions.

What You Can Do

Erect Barn Owl Trust-approved nest boxes on suitable buildings and trees
Register nest boxes with the Barn Owl Trust monitoring programme
Avoid using second-generation anticoagulant rodenticides near barn owl habitat
Manage field margins and rough grassland to maintain vole populations
Report barn owl sightings and breeding evidence to local recording groups