The long-eared owl is a secretive nocturnal raptor dependent on farmland-woodland edge habitats and its welfare is closely linked to small mammal prey availability.
Welfare threats include rodenticide secondary poisoning from eating poisoned prey, loss of rough grassland foraging habitat, nest site loss from woodland removal, and disturbance of communal winter roosts by birdwatchers. Field vole population crashes cause starvation in years of low prey availability, affecting adult body condition and breeding success.