Barn Owl Diet and Feeding Ecology

Barn owls are specialist predators of small mammals whose welfare and population size depends entirely on prey availability and appropriate foraging habitat.

Key Facts

A breeding pair of barn owls and their chicks can consume over 1,000 small mammals in a single breeding season
Rough grassland, roadside verges, and wetland edges provide the vole and shrew habitat barn owls depend on
Modern agricultural intensification has removed much of this habitat, causing significant barn owl population decline
Barn owls cannot hunt in wet conditions — prolonged rain during breeding significantly increases chick mortality
Anticoagulant rodenticides accumulate in barn owl prey, causing poisoning and death in adult birds
Nest boxes installed in appropriate locations significantly increase breeding success where natural cavities are scarce

Welfare Considerations

Barn owl welfare is inseparable from landscape management — without prey-rich rough grassland within foraging range, pairs cannot successfully breed. Rodenticide poisoning of breeding adults during the chick-rearing period causes both the death of the adult and starvation of dependent chicks. The combination of habitat loss and chemical poisoning represents a systemic welfare failure at landscape scale.

What You Can Do

Install barn owl nest boxes in appropriate locations on farmland and estates
Maintain or restore rough grassland margins around arable fields for small mammal habitat
Stop or reduce anticoagulant rodenticide use where barn owls are present
Support agri-environment schemes that pay for wildlife-friendly field margins
Report barn owl casualties to the Barn Owl Trust for monitoring purposes
Join local wildlife groups that monitor and support barn owl populations in your area