 The breeding season starts in May in Poland but further north in Scandinavia may not start until early July . The female fieldfare builds a cup @-@ shaped nest with no attempt at concealment . The location is often in woodland but may be in a <unk> , garden , among rocks , in a pile of logs , in a <unk> or on the ground . <unk> usually nest in close proximity to others of the same species . The adults will defend the nest aggressively and nesting <unk> may offer protection from predators . The nest is built of dried grasses and weeds with a few twigs and a little moss , with a lining of mud and an inner lining of fine grasses . There are usually five to six eggs in a clutch , but occasionally three , four , seven or eight eggs are laid . The eggs vary in size from 28 @.@ 8 by 20 @.@ 9 millimetres ( 1 @.@ 13 in × 0 @.@ 82 in ) to 33 @.@ 5 by 23 @.@ 4 millimetres ( 1 @.@ 32 in × 0 @.@ 92 in ) and are variable in colour . Many are pale blue speckled with fine brown dots and resemble those of the common <unk> . Others are bright blue , with or without larger red @-@ brown <unk> . Incubation starts before all the eggs are laid and lasts for thirteen to fourteen days . The female does all or most of the incubation . The chicks are <unk> and both parents bring food to them . They are usually ready to leave the nest after fourteen to sixteen days and there may be two broods in the season , especially in the southern parts of the breeding range . 
