black raven, black crow sitting on a branch of birch trees

abstract animal avian background beak bird birdofdarkness birdwatching black blackcolor blackplumage blackravenillustration blackravensitsonatree branch claw contrast corax corone corvus creepy crow cunning dark darkness detailed draw feather feathered flight flying greatcrows halloween handdrawn illustration moon mystical nature ornithology raven silhouette sky spooky symbol tree twig white wild wildlife wing