The little owl (Athene noctua) was introduced to England in the 19th century and became a beloved farmland species, yet populations have declined by 64% since 1970. The collapse of invertebrate prey — earthworms, beetles, and moths — on intensively managed farmland has caused progressive breeding failure.
Little owls in severe winter weather experience food stress: frozen ground prevents access to earthworms and beetle larvae that form the majority of their winter diet. Prolonged frost events cause direct starvation mortality. Breeding failure occurs when invertebrate abundance in spring is insufficient to provision chicks during peak demand. Nest site loss forces pairs to accept suboptimal cavities where chick survival is lower. Conservation welfare interventions include nest box provision in territories with suitable hunting habitat, agri-environment scheme payments for rough grazing near nest sites, and farmland bird buffer strips that maintain invertebrate-rich areas.