The IUCN maintains a list of endangered animals. That list is called the IUCN Red List of Threatened Species and it assigns a specific category to each endangered animal based on its vunlernability to extinction. These categories include:
- Least Concern - There is no immediate threat to the survival of the species.
- Near Threatened - May become vulnerable, endangered, or critically endangered in the near future.
- Conservation Dependent - The species is not threatened, but depends on conservation efforts to sustain its .
- Vulnerable - The species faces a high risk of extinction in the wild.
- Endangered - The species faces a very high risk of extinction in the wild.
- Critically Endangered - The species faces an extremely high risk of extinction in the wild.
- Extinct in the Wild - The species only survies in captivity, there are no longer any individuals in the wild.
- Extinct - All individuals of the species have died in the wild and in captivity.