Ключевые слова: adder, animal, basking, bent, black, brown, colorful, common, common viper, creature, dangerous, dawn, down, endangered, environment, fresh, gray, green, habitat, head, herpetology, huddled, inactive, lifting, lying, moss, natural, nature, outdoor, reptile, resting, rock, seasonal, snake, species, summer, summertime, sun, sunbathing, sunrise, toxic, twisted, vertebrate, vibrant, viper, vipera, vipera berus, vivid, wilderness, wildlife,