Short-Eared Owl Welfare: Open Country Specialist
Species Overview
The short-eared owl (Asio flammeus) is a medium-sized owl that breeds on upland moorland, bog, and rough grassland, and winters in lowland agricultural areas. Unlike most owls, it is active by day, making it relatively observable. UK breeding populations (~3,000 pairs) fluctuate with vole abundance; in vole peak years, populations increase dramatically. Wintering birds arrive from Scandinavia, swelling UK numbers considerably.
Prey Dependence and Welfare
Short-eared owls feed primarily on field voles. Their welfare is intimately tied to vole population cycles: in vole crash years, short-eared owls may fail to breed entirely or abandon territories. Maintaining rough grassland and tussocky habitats that support high vole densities is the most important welfare action for this species. Loss of rough grassland through agricultural intensification, drainage, and improved pasture management has reduced foraging habitat in many lowland areas.
Breeding Habitat Requirements
Breeding habitat: open moorland, young forestry plantations, lowland rough grassland, and marsh edges. Nests on the ground in vegetation. Key requirements: adequate prey density within the territory; open ground for hunting (low vegetation allowing visual prey detection); ground cover for nest concealment; and minimal human disturbance during April-August. Even relatively small areas of suitable habitat can support breeding pairs in vole peak years.
Welfare Threats
Key threats: illegal persecution (shooting, trapping) on some managed grouse moors; habitat loss (moorland drainage, rough grassland improvement); secondary rodenticide poisoning (short-eared owls feed on voles in agricultural areas where rodenticides are used; anticoagulant body burdens are documented); lead poisoning from shot prey; and human disturbance at nest sites.
Conservation and Monitoring
BTO ringing, BBC atlas data, and moorland monitoring track short-eared owl distribution and abundance. Agri-environment measures creating and maintaining rough grassland and tussocky habitats support prey populations. Legal protection enforcement reduces persecution. Reducing anticoagulant rodenticide use in the wider countryside benefits short-eared owls and other raptor species. Retaining young forestry plantation habitat (before canopy closure) in upland areas provides additional breeding sites during vole peak years.