This widely recognised inventory is developed by the International Union for Conservation of Nature (IUCN). It aims to assess the conservation status of animals, plants and fungi, while also providing information to support and promote conservation work. Species are evaluated globally and classified into the following categories:
| Extinct | ||||
| Extinct in the Wild | Known only to survive in captivity or outside the historic range | |||
| Threatened Species | Critically Endangered | Extremely high risk of extinction in the wild | Critically Engangered Extremely high risk of extinction in the wild | |
| Endangered | Very high risk of extinction in the wild | Endangered Very high risk of extinction in the wild | ||
| Vulnerable | High risk of extinction in the wild | Vulnerable High risk of extinction in the wild | ||
| Near Threatened | Likely to become threatened in the near future | |||
| Least Concern | Widespread and abundant | |||
| Data Deficient | Lacking data on abundance or distribution | |||
