Ключевые слова: adder, animal, beautiful, berus, brown, close, closeup, common, creeping, crossed, danger, dangerous, deadly, endangered, eurasian, european, fauna, fear, fearsome, female, frightening, gray, head, herpetology, nature, poikilothermic, poison, poisonous, portrait, reptile, reptilian, scales, scary, skin, slithering, snake, species, toxic, venom, venomous, viper, vipera, viperidae, viperinae, wild, wildanimal, wildlife, zoology,