利用者:Dolfin/IUCN Red List
IUCN Red List
The conservation status of a w:species is an indicator of the likelihood of that species continuing to survive. Many factors are taken into account when assessing the conservation status 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 conservation status listing is the w:IUCN Red List, but many more specialised lists exist.
The following conservation status categories are recommended for use in Wikipedia entries. They are loosely based on the IUCN categories.
- Secure or lower risk: no immediate threat to the survival of the species. Examples: w:Bottlenose Dolphin
- Vulnerable: faces a high risk of extinction in the medium-term. Example: w:Ring-tailed Lemur
- Endangered: faces a very high risk of extinction in the near future. Examples: w:Blue Whale
- Critical or critically endangered: faces an extremely high risk of w:extinction in the immediate future. Example: w:Slender-billed Curlew.
- Extinct in the wild: captive individuals survive, but there is no free-living, natural population. Examples: w:Dromedary, w:Przewalski's Horse.
- Extinct: the last remaining member of the species had died, or is presumed to have died beyond reasonable doubt. Examples: w:Thylacine, w:Dodo.