Song Thrush Welfare and Population Decline

The song thrush has declined 51% since 1970 in the UK, yet remains common enough to be heard in many gardens. Its melodic repeated phrases are iconic — but the welfare issues driving its decline require urgent attention.

Key Facts

51% decline in UK since 1970 — red-listed in UK and amber-listed on Birds of Conservation Concern
Famous for anvil behaviour — breaking snail shells on stones to access the meat
Requires moist soil with earthworm access — drought causes severe food stress
More sedentary than other thrushes — less able to evacuate frozen areas
High first-year mortality — most young thrushes die in their first winter

Welfare Considerations

Song thrush welfare is particularly vulnerable to summer drought — earthworms retreat to deeper soil layers and snails seal themselves against dry surfaces, removing the two primary food sources. Climate change increasing drought frequency creates recurring welfare crises. Pesticide use reducing earthworm populations is a longer-term welfare concern. Garden management that maintains moisture-retaining mulch and avoids soil desiccation improves earthworm availability in summer. The provision of a permanently damp area in gardens — under a dense shrub or in a damp corner — directly improves song thrush welfare during drought periods.

What You Can Do

Maintain a permanently moist shaded corner in your garden for song thrush foraging
Never use slug pellets — they poison song thrushes both directly and by removing snail prey
Provide supplementary mealworms during prolonged dry spells in summer
Record song thrush territories to BTO Garden BirdWatch
Donate to BTO research into song thrush survival rates and habitat requirements