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| Order | Family | English Common Name | Spanish Common Name | Portuguese Common Name | Scientific Name | Belonging | Records | Conservation status | Notes | ||
| 1 | Anseriformes | Anatidae | Lake Duck | Pato Zambullidor Chico | Marreca-pé-na-bunda | Oxyura vittata | Native | 1 |
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| 2 | Red Shoveler | Pato Cuchara | Marreca-colhereira | Spatula platalea | Native | 1 |
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| 3 | Podicipediformes | Podicipedidae | Pied-billed Grebe | Macá Pico Grueso | Mergulhão-caçador | Podilymbus podiceps | Native | 1 |
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| 4 | Silvery Grebe | Macá Plateado | Mergulhão-de-orelha-amarela | Podiceps occipitalis | Native | 1 |
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