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