Wildlife

Barn Owl: Rodenticide Poisoning Now the Leading Human Cause of Death

Barn owls are beloved but face a growing welfare crisis from second-generation anticoagulant rodenticides.

Key Facts

Studies show over 75 percent of barn owls in Britain carry detectable rodenticide residues
Second-generation anticoagulants like brodifacoum persist in tissues and bioaccumulate
UK barn owl population is estimated at around 4,000 pairs
They are highly sensitive to cold winters and many birds die from starvation in hard weather
Barn owls hunt by hearing as much as by sight using asymmetrically positioned ears

Welfare Considerations

Barn owls that accumulate rodenticide residues suffer internal haemorrhage affecting kidneys, liver, and nervous tissue. Sub-lethal poisoning impairs hunting ability accelerating starvation. Starving owls in winter suffer extended periods of food deprivation before death. Traffic collisions kill thousands annually as birds hunt along road verges. Loss of traditional barns removes breeding sites.

What You Can Do

Advocate for restrictions on second-generation anticoagulant rodenticides accessible to farm use
Support the Barn Owl Trust national nest box scheme and population monitoring
Install barn owl nest boxes on farms replacing lost traditional barn sites
Campaign for road speed reductions in areas with known high barn owl road mortality
Report barn owl deaths with residue testing through Barn Owl Trust monitoring schemes