Ключевые слова: adder, animal, basking, beautiful, berus, brown, camouflage, closeup, colorful, common, creature, creeping, crossed, danger, dangereous, dangerous, endangered, european, fear, fearsome, frightening, full length, gray, habitat, herpetology, male, natural, nature, poikilothermic, poison, poisonous, predator, reptile, reptilian, scales, scary, snake, toxic, venom, venomous, vertebrate, viper, vipera, viperidae, viperinae, wild, wildanimal, wildlife, zoology,