Conservation status

The conservation status of a group of organisms (for instance, a species) indicates whether the group  still exist (that is, members of it are still alive) and how likely the group is to become extinct in the near future. Many factors are taken into account when assessing conservation status: not simply the number of individuals remaining, but the overall increase or decrease in the population over time, breeding success rates, known threats, and so on.
The IUCN Red List of Threatened Species is the best-known worldwide conservation status listing and ranking system. The system divides threatened species into three categories: Critically Endangered (CR), Endangered (EN), and Vulnerable (VU)
Conservation status by risk of extinction

  Extinct

     Extinct
     Extinct in the wild
 Threatened
    Critically endangered
    Endangered
    Vulnerable
  At lower risk
    Conservation dependent
    Near threatened
    Least concern


THE RED DATA LIST


The IUCN Red List of Threatened Species (also known as the IUCN Red List or Red Data List), founded in 1963, is the world's most comprehensive inventory of the global conservation status of biological species. The International Union for Conservation of Nature (IUCN) is the world's main authority on the conservation status of species. A series of Regional Red Lists are produced by countries or organizations, which assess the risk of extinction to species within a political management unit.

The percentage of species in several groups which are listed as      critically endangered,      endangered, or      vulnerable on the 2007 IUCN Red List.


MORE DETAILS---- IUCN RED DATA LIST