Song thrushes have declined by 54% in Britain since the 1970s but show signs of partial recovery in areas with appropriate habitat management.
Song thrush welfare is directly affected by the availability of earthworms and other invertebrate prey. Dry summers and pesticide-depleted soils reduce foraging success, increasing energy expenditure to meet nutritional needs. Hard winters when frozen ground prevents earthworm access cause starvation. Individual song thrushes in pesticide-free gardens with moist soil and available snails have better welfare outcomes than those in intensive agricultural landscapes. Creating and maintaining appropriate habitat in gardens and farmland directly prevents individual welfare harms from food shortage.