Feeding Common starling

a flock foraging @ farm in northern ireland

the common starling largely insectivorous , feeds on both pest , other arthropods. food range includes spiders, crane flies, moths, mayflies, dragonflies, damsel flies, grasshoppers, earwigs, lacewings, caddisflies, flies, beetles, sawflies, bees, wasps , ants. prey consumed in both adult , larvae stages of development, , common starlings feed on earthworms, snails, small amphibians , lizards. while consumption of invertebrates necessary successful breeding, common starlings omnivorous , can eat grains, seeds, fruits, nectar , food waste if opportunity arises. sturnidae differ birds in cannot metabolise foods containing high levels of sucrose, although can cope other fruits such grapes , cherries. isolated azores subspecies of common starling eats eggs of endangered roseate tern. measures being introduced reduce common starling populations culling before terns return breeding colonies in spring.

an adult foraging , finding food young chicks

there several methods common starlings obtain food part, forage close ground, taking insects surface or underneath. generally, common starlings prefer foraging amongst short-cropped grasses , found among grazing animals or perched on backs, feed on mammal s external parasites. large flocks may engage in practice known roller-feeding , birds @ of flock continually fly front feeding opportunities best. larger flock, nearer individuals 1 while foraging. flocks feed in 1 place time, , return previous foraged sites.

there 3 types of foraging behaviour observed in common starling. probing involves bird plunging beak ground randomly , repetitively until insect has been found, , accompanied bill gaping bird opens beak in soil enlarge hole. behaviour, first described konrad lorenz , given german term zirkeln, used create , widen holes in plastic garbage bags. takes time young common starlings perfect technique, , because of diet of young birds contain fewer insects. hawking capture of flying insects directly air, , lunging less common technique of striking forward catch moving invertebrate on ground. earthworms caught pulling soil. common starlings have periods without access food, or have reduction in hours of light available feeding, compensate increasing body mass deposition of fat.