- Extinct (X)
- A Wildlife Species that no longer exists.
- Extirpated (XT)
- A Wildlife Species that no longer exists in the wild in Canada, but exists elsewhere.
- Endangered (E)
- A Wildlife Species facing imminent extirpation or extinction.
- Threatened (T)
- A Wildlife Species that is likely to become an endangered if nothing is done to reverse the factors leading to its extirpation or extinction.
- Special Concern (SC)
- A Wildlife Species that may become threatened or endangered because of a combination of biological characteristics and identified threats.
- Data Deficient (DD)
- A category that applies when the available information is insufficient (a) to resolve a Wildlife Species' eligibility for assessment or (b) to permit an assessment of the Wildlife Species' risk of extinction.
- Not At Risk (NAR)
- A Wildlife Species that has been evaluated and found to be not at risk of extinction given the current circumstances.