Song thrush populations have declined by 50% in the UK, with agricultural intensification and loss of winter food being primary drivers.
Song thrushes face welfare challenges from habitat loss limiting food availability, particularly in winter when earthworms become inaccessible in frozen ground. Garden populations that receive supplementary water for anvil use (snail smashing) and retain earthworm-rich lawns experience better welfare. Farmland populations face greater pressure from agricultural intensification.