Ключевые слова: amphibia, amphibian, animal, animals, aquatic, background, beautiful, behaviour, biology, closeup, common, croak, croaking, edible, environment, esculenta, europe, european, fauna, frog, green, green frog, inflating, lake, marsh, marsh frog, mateing, mating, natural, nature, outdoors, pelophylax, pond, pool, rana, ridibundus, small, swamp, toad, water, wet, wild, wild life, wildlife,