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 | |
|---|---|---|
| Andorra | 2 | 2 |
| Portugal | 13 | 15 |
| Espanha | 17 | 18 |
| Argentina | 38 | 39 |
| Bolívia | 21 | 24 |
| Brasil | 80 | 97 |
| Chile | 19 | 18 |
| Colômbia | 58 | 63 |
| Costa Rica | 11 | 12 |
| Cuba | 10 | 10 |
| República Dominicana | 7 | 6 |
| Equador | 47 | 49 |
| El Salvador | 6 | 6 |
| Guatemala | 15 | 16 |
| Honduras | 8 | 10 |
| México | 96 | 97 |
| Nicarágua | 7 | 9 |
| Panamá | 17 | 18 |
| Paraguai | 10 | 11 |
| Peru | 53 | 51 |
| Uruguai | 10 | 9 |
| Venezuela (República Bolivariana da) | 35 | 37 |
| Guiné-Equatorial | 23 | 24 |