The blackbird (Turdus merula) is one of Britain's most familiar and beloved birds — the rich, fluting song of the male blackbird is among the most beautiful sounds of the natural world. A resident breeding species that is reinforced by Scandinavian migrants in winter, blackbirds are found in gardens, parks, hedgerows, and woodland edges across the country.
Blackbirds are thrushes, feeding primarily on earthworms extracted from lawns and moist soil by tilt-and-pull behaviour, supplemented by berries, fruits, and invertebrates. They are highly territorial, with males maintaining and defending territories through song throughout the year. Multiple broods of 3-5 eggs are raised from March to July; females construct distinctive cup nests lined with mud in shrubs, hedgerows, and climbers.
Blackbirds are among the most important garden wildlife species. They benefit significantly from:
Blackbirds face several threats in domestic gardens: domestic cat predation (the most significant predation pressure in suburban areas); window strikes (a significant cause of mortality); and ground-nesting nest failure from disturbance or predation. Reducing cat predation risk (belling, keeping cats indoors at dawn and dusk) and window strike mitigation (external window films, hawk silhouettes) benefit blackbird populations.
The blackbird's song is among the most complex and individually variable of any British bird. Males develop increasingly elaborate song through their lifetimes and may incorporate learned elements from neighbours. Blackbirds begin singing from late January/February — one of the first signs of lengthening days — and song continues until July. Dusk song, often the last bird call of the evening, is particularly distinctive.