Ключевые слова: biebrza, birds, blue, bog, cloud, danger, desert, dunika, ecosystem, flooded, footbridge, forest, grass, lake, latvia, liepaja, marsh, meadow, mud, national, natural, nature, park, peat, podlaskie, polish, pond, pool, preservation, quagmire, quicksand, reserve, river, savannah, season, submerged, summer, swamp, travel, treasure, tree, water, weather, wet, wetland, white, wild, wildlife, woods,