由於一種用於治療牛疾病的藥物，印度禿鷹在二十多年前就開始消失。禿鷹是食腐動物，主要食用動物屍體，有助控制環境中細菌及病原體。研究發現，禿鷹消失後，引發更多因牲畜、流浪狗等的屍體導致的疾病和狂犬病傳播，並增加人類死亡率。
Indian’s vultures in India began to disappear over two decades ago because of a drug used to treat sick cattle. vultures are scavengers that feed on dead animals, controlling bacteria and pathogens. A study discovered the disappearance of vultures led to more spread of diseases and rabies caused by the carcasses of livestock and stray dogs, and increased human death rates.
