close up of a flying adult raven, corvus corax, above the stream valley of the rolder diep in the dutch province of drenthe

corvus corax pearl raven rolderdiep adult animal autumn avifauna background beak beautiful bird birds black blue close common cumulus clouds diamondshaped drenthe eats carcasses eye contact feather fly glide intelligent large late summer monogamous natural nature nice noisemakers omnivorous ornithology outdoor outdoors pair sky stream valley tail two white wild wildlife wing beat flying rolder diep dutch province clear