eurasian rook feeding on plowed field

rooks eating eat earthworms lawn bird drives beak soil catching worm rook appetitive behavior seeking searching behaviour feeding foraging ethology hexicology food ecology diet rainworm bloodworm brandling lumbricus terrestris dew corvus frugilegus eurasian animal birdwatching black carrion corvids crow crowing environment birds field meadow ornithology park raven scavenger wildlife wintering plowing plowed land arable ploughing