Kestrel Population and Small Mammal Welfare

Kestrel populations have declined by 30% since the 1970s, partly due to reductions in vole and other small mammal prey from grassland intensification.

Key Facts

Kestrels depend primarily on field voles, which require tussocky rough grass habitat
UK grassland intensification has reduced field vole habitat by over 50% since 1970
Kestrels hover above motorway verges — one of the last rough grassland reservoirs
Secondary poisoning from rodenticides affecting voles and their predators is a growing concern
Kestrel breeding success is almost entirely determined by vole population density

Welfare Considerations

Kestrel welfare is mediated by prey availability: breeding pairs in vole-rich territories raise 4-5 chicks successfully; those in prey-poor areas fail repeatedly, consuming energy in failed breeding attempts. Individual kestrels in prey-depleted landscapes experience chronic nutritional stress and reproductive failure — a welfare harm that persists across their lifespan. Road verge management that maintains rough grassland, and farming practices that preserve field margin habitat, directly improve kestrel welfare through prey base restoration.

What You Can Do

Advocate for rough grassland preservation in road verge management policies
Support agri-environment schemes paying for tussocky field margins and headlands
Never use rodenticides in areas where kestrels are hunting
Monitor kestrel breeding success in your local area through BTO surveys
Support Hawk and Owl Trust kestrel research and habitat provision programmes