"Extremely venomous pit viper ( genus Bothrops), found in diverse tropical American habitats, from cultivated lands to forests." Vipers ( adders) and rattlesnakes manufacture the blood poison, which is known as haemolytic. 蛇科响尾蛇亚科洞蛇属极毒蛇类,遍布美洲热带各种生境,从耕地到热带森林。蝰蛇(小蝰蛇)和响尾蛇产生血毒液,这种毒液叫溶血素。