Extinct Extinct in the Wild The conservation status of a species is an indicator of the likelihood of that species continuing to survive either in the present day or the future. ... The Dodo, shown here in illustration, is an often-cited[1] example of extinction. ... The Dodo, shown here in illustration, is an often-cited[1] example of extinction. ...
Threatened
Critically Endangered Endangered Vulnerable An endangered species is a species whose population is so small that it is in danger of becoming extinct. ... The critically endangered Amur Tiger, a rare subspecies of tiger. ... A vulnerable species is one whose chances of extinction characterize it as threatened but not quite as endangered. ...
Lower risk
Near Threatened Conservation Dependent Least Concern Near Threatened (NT) is an IUCN category assigned to species or lower taxa which may be considered threatened with extinction in the near future, although it does not currently qualify for the threatened status. ... Conservation Dependent (LR/cd) was an IUCN category assigned to species or lower taxa which were dependent on conservation efforts to prevent the taxon becoming threatened with extinction. ... Least Concern (LC) is an IUCN category assigned to species or lower taxa which do not qualify for any other category. ...
See also
World Conservation Union IUCN Red List The World Conservation Union or International Union for Conservation of Nature and Natural Resources (IUCN) is an international organization dedicated to natural resource conservation. ... The IUCN Red List of Threatened Species (also known as the IUCN Red List and Red Data List), created in 1963, is the worlds most comprehensive inventory of the global conservation status of plant and animal species. ...
NatureServe, in cooperation with other conservation partners, has developed its own conservation status ranking system. NatureServe is a non-profit environmental conservation organization. ... The conservation status of a species is an indicator of the likelihood of that species continuing to survive either in the present day or the future. ...
In their system, G codes refer to rankings made at the global level, N codes refer to rankings made at a national level and S codes refer to rankings made at the sub-regional level, such as states within the US:
X - presumed extinct (not located despite extensive searches)
H - possibly extinct [or h historical occurrence (still some hope of discovery)]
1 - critically imperilled (typically five or fewer occurrences or 1,000 or fewer individuals)
2 - imperilled (typically six to twenty occurrences or 1,000 to 3,000 individuals)
3 - vulnerable (rare; typically 21 to 100 occurrences or 3,000 to 10 000 individuals)
R or ? - Recorded within nation or state, but local status not available; when combined with global rank of G1 to G3, local status is 'Indeterminate'
4 - Apparently secure (uncommon but not rare; some cause for long-term concern, usually more than 100 occurrences and 10,000 individuals)
5 - Secure (common, widespread and abundant)
Thus, for example, a G3 species is "globally vulnerable", and an N2 species is "nationally imperilled" for whatever country the rank is assigned. Species with G, N, or S rankings of 4 or 5 are generally not the basis for major conservation actions. The Dodo, shown here in illustration, is an often-cited[1] example of extinction. ...
The conservationstatus of a species is an indicator of the likelihood of that species continuing to survive either in the present day or the future.
Many factors are taken into account when assessing the conservationstatus of a species: not simply the number remaining, but the overall increase or decrease in the population over time, breeding success rates, known threats, and so on.
The best-known worldwide conservationstatus listing and ranking system is the IUCN Red List, but other more specialised lists and systems exist, such as The Nature Conservancy'sconservationstatus ranking system.
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