blue; animals; autumn; background; bevy; bird; birds; blackbirds; colony; contour; corvus; crowd; drift; flight; flock; fly; formation; group; large; leaving; lot; many; migrating; migration; motion; nature; pattern; season; sky; wildlife: Bilder zum Thema blue; animals; autumn; background; bevy; bird; birds; blackbirds; colony; contour; corvus; crowd; drift; flight; flock; fly; formation; group; large; leaving; lot; many; migrating; migration; motion; nature; pattern; season; sky; wildlife bei ClipDealer