Ключевые слова: adder, animal, beautiful, biology, blue, closeup, colorful, danger, dangerous, deadly, endangered, european, eyes, fauna, head, hibernation, iucn, meadow, molt, nature, poison, portrait, predator, protected, rakosiensis, rare, ready for moult, reptile, reptilian, romania, scales, scarce, scary, shedding, skin, slough, snake, species, threatened, toxic, toxicity, transylvania, ursinii, venom, venomous, viper, vipera, wild, wildlife, zoology,