The common starling (Sturnus vulgaris) has declined by over 50% in the UK since the 1970s despite its apparent abundance. Conservation requires addressing breeding habitat, invertebrate food sources, and winter roost protection.
Starlings, once extraordinarily abundant, have declined dramatically from UK farmland—the breeding population has fallen from approximately 7 million pairs to around 3.5 million over 50 years. While urban and suburban populations remain relatively stable (hence their apparent abundance in towns), farmland populations have collapsed. This reflects the loss of the grassland invertebrate prey—particularly leatherjackets (crane fly larvae)—that starlings depend on for breeding and post-breeding condition building.
Starlings feed on soil invertebrates by probing turf with their bills—a behaviour called "open-bill probing" or olfactory foraging. Permanent pasture grazed at appropriate intensity, mixed grassland, and less intensively managed parkland and sports fields provide productive foraging. Agricultural intensification, particularly conversion of permanent grassland to intensive arable and use of pesticides reducing invertebrate abundance, has removed this food source from much of the countryside.
Starlings nest in cavities—natural tree holes, old woodpecker holes, and holes in buildings. Loss of old trees from farmland and tidying of building exteriors reduces nesting sites. Provision of starling nest boxes (larger entrance hole diameter than tit boxes—45mm) can supplement natural sites. Pairs require invertebrate-rich foraging within 150m of the nest—breeding habitat improvement must address both nesting sites and food availability simultaneously.
Winter starling murmurations—spectacular aerial displays of thousands or millions of birds—are among Britain's greatest wildlife spectacles. These roosts provide safety in numbers from raptors (particularly peregrine falcons). Roost sites at reedbeds and woodland require protection from disturbance that would move birds to less suitable locations. The spectacular nature of murmurations generates enormous public engagement with wildlife conservation.