Barn Owl Nest Box Programs and Rodenticide Risk

How barn owl nest box programs support wild populations and the critical threat that second-generation rodenticides pose to these beneficial raptors.

Key Facts

Barn owl populations have declined significantly across Europe and North America over recent decades
Nest box programs have proven highly effective at supporting barn owl breeding in farmed landscapes
Second-generation anticoagulant rodenticides are detected in the majority of barn owls tested in many countries
Rodenticide poisoning causes internal bleeding, weakness, and prolonged suffering before death
Integrated pest management reduces rodent populations without the need for toxic compounds

Welfare Considerations

Barn owls face a hidden welfare crisis from rodenticide poisoning that affects individual birds while undermining the population recovery that nest box programs are working to achieve. A barn owl that ingests rodenticide-poisoned prey may suffer for days before dying from internal haemorrhage. The irony is profound: rodenticides are often deployed where barn owls could naturally control rodent populations if given the chance. Transitioning farms and properties to nest-box-supported barn owl predation reduces rodent pressure more sustainably and without poisoning the wider food web.

What You Can Do

Install barn owl nest boxes on rural properties in consultation with local wildlife trusts
Eliminate use of second-generation anticoagulant rodenticides on your property
Advocate for stricter regulation of rodenticides harmful to raptors and other wildlife
Support farmers who adopt integrated pest management over routine rodenticide use
Report sick or dead barn owls to wildlife monitoring programs for toxicology analysis