Extinct species are those species which are not found after searches of known or likely areas where they may occur. A species may be extinct from a local area, region, country, continent or the entire earth. Examples of such species are the Asiatic cheetah, pink-headed duck. Endangered species are those species which are in danger of extinction. The survival of such species is difficult if the negative factors that have led to a decline in their population continue to operate. The examples of such species are black buck, crocodile, Indian rhino, Indian wild ass, lion tailed Amacaque, sangai, etc. Special measures are taken to protect endangered species, for example, hunting of such animal is banned under Wildlife Protection Act.