Ключевые слова: animals chimney, apartment, avian, avian flu, avian influenza, bird, bird flu, bird flying, bird migration, birdhouse, birds, birds nest, black, brick, bricks, brood, building, corvus monedula, couple, crow, crows, dormer, dormer window, eurasian jackdaw, floor, gray, house, insulation, jackdaw, jackdaws, livingroom, nest, nesting, rampart, raven, raven bird, ravens, roof, rooflights, skylight, sociable, songbird, storey, swarm of birds, tree, tree house,