Ключевые слова: animal, background, beak, bird, birdwatching, black, branch, close, closeup, common, corvidae, corvus, crow, dark, feather, field, flight, flock, fly, frugilegus, garden, isolated, landing, natural, nature, ornithology, outside, raven, rook, rooks black, silhouette, sitting, snowstorm, tree, white, wild, wildlife, wing, winter,