Wild Barn Owl Welfare and Rodenticide

Barn owls are iconic predators at the top of agricultural food chains — secondary rodenticide poisoning from consuming rodents killed by rat poison is a major welfare threat.

Key Facts

Barn owls (Tyto alba) are highly susceptible to secondary poisoning from rodenticides consumed by their prey.
Second-generation anticoagulant rodenticides (SGARs) including brodifacoum persist in the food chain and accumulate in apex predators.
Studies show SGAR residues in 80% or more of barn owl livers tested in the UK — many at concentrations sufficient to cause death.
Poisoned barn owls die slowly from internal haemorrhage over several days — a prolonged welfare harm.
Barn owls naturally control rodent populations — their loss from farmland increases rodent pressure requiring more chemical intervention.

Welfare Considerations

Secondary rodenticide poisoning causes prolonged suffering in barn owls — internal bleeding from anticoagulant poisoning is not an acute death but a drawn-out haemorrhagic decline that may take days. The welfare tragedy is compounded by the ecological irony: barn owls are the most effective and humane rodent control agents available to farmers, but rodenticide use kills them, removing natural control and increasing rodent pressure. Choosing barn owl-friendly rodent management protects both owl welfare and the ecological services these birds provide.

What You Can Do

Install barn owl nest boxes on farm buildings and in woodland edges to support breeding populations.
Avoid second-generation anticoagulant rodenticides — use first-generation alternatives or non-rodenticide control methods.
Report sick or dead barn owls to the Campaign for Responsible Rodenticide Use for poisoning investigation.
Support surveys of barn owl SGAR contamination rates that build the evidence base for rodenticide regulation.