Ключевые слова: animal, animal behaviour, bird prey, birdwatching, blue sky, blues, branch, city birds, city park, clever bird, corbie, corvus, crow, crow sitting, crowd, daw, dumb animals, feather, flock of rooks, flying jackdaws, flying rooks, gray, gray crow, heavy fog, horde, huddle, intelligence animal, migration concept, migratory bird, multitude, nature, ornithology, park, raven, rook, scavenger, silhouette, sky, smart animals, stressanxiety depression, swarm, tree, tree crow, wildlife, wings,