Barn Owl Welfare and Climate Change Impacts

Barn owls are highly sensitive to wet winters and cold springs. Climate change is shifting precipitation patterns in ways that can cause population crashes in this beloved farmland predator.

Key Facts

UK barn owl population estimated at 4,000-5,500 breeding pairs — relatively stable
Vole population crashes directly cause barn owl breeding failure and starvation
Wet autumns reduce hunting success — barn owls cannot hunt in heavy rain
Average lifespan 1-4 years — high annual turnover makes population vulnerable to bad winters
Rodenticide secondary poisoning affects 75-80% of barn owls tested in England

Welfare Considerations

Barn owl welfare is acutely affected by weather: a prolonged wet autumn can cause breeding adults and juveniles to starve over winter. Barn owls cannot waterproof their feathers sufficiently for rain hunting — they depend on dry nights for foraging efficiency. Climate change projections for the UK include wetter, warmer winters that may reduce vole populations through flooding of vole tunnels while simultaneously reducing barn owl hunting success. Rodenticide exposure — through eating poisoned voles — is detected in 80% of surveyed birds and is associated with internal bleeding, disorientation and reduced hunting ability. Managing land for natural rodent control rather than chemical rodenticides improves barn owl welfare significantly.

What You Can Do

Install barn owl nest boxes — follow Barn Owl Trust siting and design guidelines
Use alternatives to second-generation anticoagulant rodenticides (SGARs)
Maintain rough tussocky grassland margins as vole habitat on farms
Donate to the Barn Owl Trust monitoring and nest box programme
Report dead barn owls for rodenticide testing through the Predatory Bird Monitoring Scheme