 The common starling is largely insectivorous and feeds on both pest and other <unk> . The food range includes spiders , crane flies , <unk> , <unk> , <unk> , damsel flies , grasshoppers , <unk> , <unk> , <unk> , flies , beetles , <unk> , bees , wasps and ants . Both adults and larvae are consumed and common starlings will also feed on earthworms , snails , small amphibians and lizards . While the consumption of invertebrates is necessary for successful breeding , common starlings are omnivorous and can also eat grains , seeds , fruits , nectar and food waste if the opportunity arises . The Sturnidae differ from most birds in that they cannot easily <unk> foods containing high levels of <unk> , although they can cope with other fruits such as grapes and cherries . The isolated Azores subspecies of the common starling eats the eggs of the endangered <unk> <unk> . Measures are being introduced to reduce common starling populations by culling before the <unk> return to their breeding colonies in spring . 
