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 | |
|---|---|
| Antigua and Barbuda | 2 |
| Argentina | 38 |
| Barbados | 3 |
| Belize | 10 |
| Bolivia | 21 |
| Brazil | 80 |
| Chile | 19 |
| Colombia | 58 |
| Costa Rica | 11 |
| Cuba | 10 |
| Dominica | 3 |
| Dominican Republic | 7 |
| Ecuador | 47 |
| El Salvador | 6 |
| Grenada | 3 |
| Guatemala | 15 |
| Guyana | 11 |
| Haiti | 4 |
| Honduras | 8 |
| Jamaica | 7 |
| Mexico | 96 |
| Nicaragua | 7 |
| Panama | 17 |
| Paraguay | 10 |
| Peru | 53 |
| St. Kitts and Nevis | 2 |
| St. Lucia | 2 |
| St. Vincent and the Grenadines | 2 |
| Suriname | 9 |
| Bahamas, The | 5 |
| Trinidad and Tobago | 2 |
| Uruguay | 10 |
| Venezuela, RB | 35 |
| Canada | 18 |
| United States | 40 |