Wild Barn Owl Welfare and Rodenticide Poisoning

How secondary poisoning from rodenticides causes significant barn owl mortality and what safer alternatives exist.

Key Facts

Second-generation anticoagulant rodenticides cause internal bleeding over days to weeks in affected animals
Studies find rodenticide residues in over 90% of barn owls tested across the UK and North America
Barn owls die from rodenticide poisoning both directly and by sublethal exposure causing immunosuppression
Barn owl populations are declining across much of their range — rodenticide exposure is a significant contributing factor
Providing barn owl nest boxes and reducing rodenticide use creates a mutually beneficial natural pest control system

Welfare Considerations

Barn owl welfare is significantly impacted by secondary poisoning from rodenticides used in agricultural and residential pest control. Second-generation anticoagulant rodenticides — which kill rodents through internal bleeding — are taken up by owls consuming poisoned rodents. The result is sublethal immunosuppression, reproductive failure, and acute poisoning deaths. The irony is complete: the pest control that harms barn owls eliminates their primary food source and the incentive for their presence. Supporting barn owl populations through nest box provision and rodenticide reduction creates more effective and sustainable pest control than chemicals while dramatically reducing barn owl welfare harm.

What You Can Do

Avoid second-generation anticoagulant rodenticides — use snap traps and first-generation products as alternatives
Install barn owl nest boxes on rural properties — barn owls control rodents without the welfare costs of poison
Advocate for regulatory restrictions on second-generation rodenticides in agricultural settings
Support Barn Owl Trust and other organizations monitoring populations and providing nest box programs