Adult male blackbirds (Turdus merula) are, as the name suggests, totally black; they have a bright golden-yellow bill and a neat yellow ring around the eye during spring and summer. Towards the end of summer the bill starts to darken. Females are brown in colour, with dark, streaky mottling on the paler, rufous breast. Juveniles resemble females, but they have pale spots on the upperparts. A range of vocalisations is produced, including a loud "pli-pli-pli" alarm call, and the fluty, melodious song.