They do not form flocks, although several birds may be loosely associated in suitable habitat.
Adult males are all black except for a yellow eyering and bill. The male sings its varied and melodious song from trees, rooftops or other elevated perches.
The female and juvenile have brown plumage and lack the bright yellow bill and eye-ring of the male.
The Blackbird has been introduced to many parts of the world outside its native range. In Australia and New Zealand at least, along with the Black Rat, the Red Fox, the Rabbit and the domestic cat, it is one of the most seriously destructive pest species.