Wild Animals

Wild Barn Owl Prey Availability

Barn owls are indicators of healthy farmland ecosystems, and their welfare is closely tied to prey availability, rough grassland habitat and building access for nesting.

Key Facts

A breeding pair of barn owls needs around 4 pairs of voles per night per chick
Field vole populations cycle every 3-5 years causing parallel owl breeding cycles
Loss of rough grassland reduces vole populations and owl hunting success
An estimated 4,000 pairs breed in the UK, down from historic highs

Welfare Considerations

Barn owls face nutritional stress during vole troughs, which can cause chick starvation and adult mortality. Rodenticide poisoning through secondary exposure (eating poisoned rodents) causes internal haemorrhage and slow death. Nest site loss through barn conversions removes essential breeding habitat.

What You Can Do

Install barn owl nest boxes in suitable rural locations
Maintain rough grassland margins and field edges for vole habitat
Avoid second-generation rodenticides; use snap traps as alternatives
Register barn owl nest boxes with the Barn Owl Trust monitoring scheme