Ключевые слова: amphibia, amphibian, animals, aquatic, attached, biology, bloodsucker, common, ecosystem, europe, european, flora, frog, frogs, fuscus, grass, green, leech, low angle, macro, marsh, nature, parasite, pelobates, plant, rare, river, splash, sucking, summer, sun, surface, swamp, toad, water, wetland, wild, wildlife, zoology,