Wild Birds

Barn Owls and Rodenticide Poisoning

Barn owls are highly susceptible to second-generation anticoagulant rodenticide poisoning as apex rodent predators, with studies finding rodenticide residues in the majority of barn owls tested across Europe.

Key Facts

Studies in the UK find SGAR residues in over 70% of barn owls tested
Barn owl populations have declined by 70% in some UK regions since the 1970s
Barn owls eat 4-5 small mammals per night, concentrating rodenticide in their systems
A single poisoned rat can deliver a lethal dose to a barn owl
Natural barn owl populations are among the most effective rodent control mechanisms available

Welfare Considerations

Barn owls poisoned by anticoagulants experience progressive internal bleeding causing weakness, disorientation, and death over days or weeks. The extended suffering before death represents a significant welfare harm. Ironically, the poisoning of barn owls and other raptors undermines the natural pest control they provide, potentially increasing rodent populations and pesticide use.

What You Can Do

Never use second-generation anticoagulant rodenticides outdoors or where barn owls may hunt
Install barn owl nest boxes on agricultural land as natural pest control
Support legislation restricting SGAR availability to professional pest controllers
Donate to organizations monitoring barn owl populations and rodenticide exposure
Advocate for integrated pest management approaches that support natural predators