Ключевые слова: adder, animal, beautiful, biology, brown, closeup, colorful, danger, dangerous, deadly, endangered, europe, european, fauna, ground, habitat, herpetology, hungarian, iucn, lethal, meadow, nature, poison, poisonous, predator, protected, rakosiensis, rare, reptile, reptilian, romania, scales, scarce, scary, serpent, snake, species, threatened, toxic, toxicity, transylvania, ursini, ursinii, venom, venomous, viper, vipera, wild, wildlife, zoology,