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| Order | Family | English Common Name | Spanish Common Name | Portuguese Common Name | Scientific Name | |
| 1 | Rodentia | Caviidae | Brazilian Guinea Pig | Cuis Grande | Cavia aperea | |
| 2 | Greater Capybara | Carpincho | Capivara | Hydrochoerus hydrochaeris | ||
| 3 | Chinchillidae | Common Plains Viscacha | Vizcacha | Viscacha | Lagostomus maximus | |
| 4 | Echimyidae | Coypu | Coipo | Ratão-do-banhado | Myocastor coypus | |
| 5 | Carnivora | Canidae | Crab-eating Fox | Zorro de Monte | Cerdocyon thous |