Ключевые слова: amphibian, animal, animals, april, arvalis, background, beautiful, blue, bluish, brown, closeup, colorful, conservation, cute, environment, europe, exotic, fauna, feromones, fresh, frog, grass, green, hormones, land, male, march, marsh, mating, moor, moorfrog, natural, nature, netherlands, one, pond, portrait, rana, ranidae, reproduction, river, season, semiaquatic, shiny, spawning, spring, view, wetland, wild, wildlife,