a rook bird is a large gregarious black-feathered bird, commonly mistaken for a crow

lawn grim single branch rooks eating soil corvidae watching corvus frugilegus corvids field foraging feeding behaviour meadow birds rook bird crow black ornithology animal wildlife raven beak nature birdwatching environment portrait avian closeup outdoor eat earthworms dew worm ecology scavenger rainworm arable land crowing catching carrion lumbricus terrestris bloodworm plowing large gregarious black-feathered distinguished species whitish featherless area face commonlyy mistaken commonly