Mammal species are mammals excluding whales and porpoises. Threatened species are the number of species classified by the IUCN as endangered, vulnerable, rare, indeterminate, out of danger, or insufficiently known.
| 2018 | 2022 | |
|---|---|---|
| Armenia | 9 | 7 |
| Belarus | 4 | 4 |
| Kazakhstan | 16 | 17 |
| Kyrgyz Republic | 5 | 5 |
| Russian Federation | 34 | 33 |