Ключевые слова: adder, aggressive, animal, beautiful, berus, brown, closeup, colorful, common, crossed, danger, dangerous, deadly, detail, endangered, eurasian, european, fauna, fear, fearsome, female, frightening, gray, herpetology, macro, natural, nature, poikilothermic, poison, poisonous, portrait, predator, reptile, reptilian, scales, skin, snake, toxic, venom, venomous, vertebrate, viper, vipera, viperidae, viperinae, wild, wildlife, zoology,