The IUCN Red List of Threatened Species was created in 1964. This is also referred to as the Red Data Book. This is the world's most inclusive record of the worldwide conservation status of biological species. The Species are categorised into nine groups by the IUCN Red List. Extinct-A species becomes extinct when the last existing member of that family dies. Extinct in wild-Undoubtedly the last member has died but the captive member endures. Critically endangered-The critically endangered species face an extremely high risk of extinction in the immediate future. Endangered-The endangered species are the species which faces a high risk of extinction in the near future. Vulnerable-The vulnerable species facing the risk of extinction in the medium term future. Near threatened-Close to qualifying among threatened species. Least concern-Low risk to extinction. Data deficient-Insufficient data to generate an analysis. Not evaluated-Not assessed against criteria.