Ключевые слова: amphibian, animal, aquatic, beautiful, beauty, beauty in nature, blue, close, common, danube, delta, ecology, ecosystem, europa, eye, eyes, face, fauna, floating on water, frog, frog legs, green, green color, horizontal, jump, jumper, lake, lakeside, legs, look, mouth, nature, one animal, outdoor, pond, reptile, river, riverside, round, species, surface, swim, tranquility, up, water, wet, wetland, wild, wildlife, zoology,