Barn Owl Conservation and Rodenticide Welfare Impacts

Barn owls are iconic farmland birds that face significant welfare threats from secondary rodenticide poisoning as they consume poisoned prey animals.

Key Facts

Approximately 50% of barn owls tested in the UK show rodenticide contamination in their livers
Anticoagulant rodenticides cause internal bleeding — death can take 6-10 days in rodents and raptors
Barn owls eat an average of 4-5 rodents per night — accumulating rodenticide from multiple sources
Brodifacoum and bromadiolone are the most toxic second-generation rodenticides to raptors
Natural rodent control by barn owls is economically valued at eliminating the need for rodenticides

Welfare Considerations

Secondary rodenticide poisoning causes prolonged suffering in barn owls that consume poisoned rodents. Anticoagulant poisoning causes internal hemorrhage — blood accumulates in body cavities and joints, causing progressive weakness, disorientation, and eventual death over days to weeks. This is one of the clearest examples of human pest control creating welfare harm in non-target species. The irony is complete: barn owls control rodent populations naturally and effectively, but rodenticide use kills the owls that would otherwise eliminate the need for rodenticides. Switching to first-generation rodenticides, snap traps, and barn owl box provision reduces both rodent populations and owl mortality.

What You Can Do

Never use second-generation anticoagulant rodenticides (brodifacoum, bromadiolone) for rodent control
Install barn owl boxes on farm buildings and rural properties to support natural rodent control
Report barn owls showing signs of rodenticide poisoning to the Wildlife Trust or RSPCA
Advocate for retailers to stop selling second-generation rodenticides to domestic customers
Support the Campaign for Responsible Rodenticide Use and similar advocacy organizations