Ключевые слова: animal, avian, background, beak, bill, bird, birding, blue, brown, calm, cold, colourful, ecosystem, fauna, feather, flock, flying, fowl, green, group, head, large, male, massive, migrate, migrating, migratory, mixed, nature, non breeding, northern, ornithology, plumage, reflections, river, species, summer, swim, water, wetland, wild, wildfowl, wildlife, wing, winged, winter,