Ключевые слова: adder, adders, animal, animals, asia, asian, common, eurasia, eurasian, europe, european, european adder, european viper, fauna, forest, grass, grassland, meadow, natural, nature, one, one animal, reptile, reptiles, reptilia, serpentes, snake, snakes, squamata, terrarium, viper, vipera, vipera berus, viperidae, viperinae, vipers, wild, wild animal, wild life, wildlife, woodland, zoo,