The IUCN Red List of Threatened Species is the world’s most comprehensive inventory of the global conservation status of plant and animal species. It is the list which ranks the status of each species on the basis of many criteria and helps governments, conservation agencies, the public and policy makers understand how urgently action is required to make sure a particular species survives.
The IUCN (International Union for Conservation of Nature) aims to have the category of every species re-evaluated every 5- 10 years, knowing that habitat loss, global warming, illegal trade and other threats can quickly change the status of animals and plants. The status is reviewed through IUCN Species Survival Commission (SSC) Specialist Groups, which are Red List Authorities with responsibly for a particular species. Currently the snow leopard is one of over 7000 animals that are considered to be threatened with extinction. The status of endangered means that the snow leopard has a very high risk of extinction in the wild. More about the IUCN red List here.