The species blackbird or also blackbird (Turdus merula), song thrush (Turdus philomelos), juniper thrush (Turdus pilaris) and redwing thrush (Turdus musicus) belong to the pest birds at the time of the grape harvest, because they like to eat the grapes and can cause greater damage. They prefer to eat the grapes from the ground, which they peck at. Unlike the starling, however, these birds do not occur in large flocks. The long-legged birds are 20 to 25 centimetres tall, have a pointed beak and relatively large eyes. They are partial migrants - besides the larger numbers migrating south in winter, some of them stay in the country.