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| Order | Family | English Common Name | Spanish Common Name | Portuguese Common Name | Scientific Name | |
| 1 | Rodentia | Caviidae | Greater Capybara | Carpincho | Capivara | Hydrochoerus hydrochaeris |
| 2 | Echimyidae | Coypu | Coipo | Ratão-do-banhado | Myocastor coypus | |
| 3 | Castoridae | North American Beaver | Castor Americano | Castor-americano | Castor canadensis | |
| 4 | Carnivora | Mustelidae | Neotropical Otter | Lobito de Río | Lontra longicaudis | |
| 5 | Canidae | Culpeo | Zorro Colorado | Lycalopex culpaeus | ||
| 6 | Artiodactyla | Cervidae | Common Brown Brocket | Corzuela Parda | Veado-catingueiro | Subulo gouazoubira |