Many blackbirds are gregarious and nest in colonies; two to seven eggs are laid. They feed on insects, seeds, and grain. The common blackbird of the
Blackbird are among the most populus of all birds, with some winter flocks numbering in the million. The yellow headed blackbird, the only North American bird with a yellow head and a black body; the red winged blackbird; and the brewer’s blackbird.
The male of the nominate subspecies, which is found throughout most of Europe, is all black except for a yellow eye-ring and bill and has a wide range of vocalisations; the adult female and juvenile have mainly brown plumage. his species breeds in woods and gardens, building a neat, mud-lined, cup-shaped nest. It is omnivorous, eating a wide range of insects, earthworms, berries, and fruits.
Both sexes are territorial on the breeding grounds, with distinctive threat displays, but are more gregarious during migration and in wintering areas. Pairs will stay in their territory throughout the year where the climate is sufficiently temperate. This common species has given rise to a number of literary and cultural references, frequently related to its melodious song.