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| CLASS: Mammals (Mammalia) |
| ORDER: Carnivorans (Carnivora) (2 Species) | South American Gray Fox (Lycalopex griseus) | ,  N | South American Sea Lion (Otaria flavescens) | ,  N |
| ORDER: Rodents (Rodentia) (3 Species) | Patagonian Mara (Dolichotis patagonum) | ,  N | Capybara (Hydrochoerus hydrochaeris) | ,  N | Coypu (Myocastor coypus) | ,  N |
| ORDER: Primates (Primates) (2 Species) | Black-and-gold Howler (Alouatta caraya) | ,  N | Black Capuchin (Sapajus nigritus) | ,  N |
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| CLASS: Birds and Reptiles (Sauropsida) |
| ORDER: Predatory, Semiaquatic Reptiles (Crocodilia) (1 Species) | Yacare Caiman (Caiman yacare) | ,  N |
| ORDER: Turtles (Testudines) (1 Species) | Hilaire’s Side-necked Turtle (Phrynops hilarii) | ,  N |
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| CLASS: Crustaceans (Malacostraca) |
| ORDER: Crayfish, Crabs, Lobsters, Prawns, and Shrimp (Decapoda) (1 Species) | Granulated Crab (Neohelice granulata) | ,  N |
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| CLASS: Arachnids (Arachnida) |
| ORDER: Spiders (Araneae) (1 Species) | Golden Silk Spider (Trichonephila clavipes) | ,  N |
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| CLASS: Insects (Insecta) |
| ORDER: Butterflies and Moths (Lepidoptera) (29 Species) | Anisochoria sublimbata (Anisochoria sublimbata) | ,  N | Burnsius orcynoides (Burnsius orcynoides) | ,  N | Orcus Chequered Skipper (Pyrgus orcus) | ,  N | Orcynia Hairstreak (Contrafacia imma) | ,  N | Cassius Blue (Leptotes cassius) | ,  N | Gold-bordered Hairstreak (Rekoa palegon) | ,  N | Adelpha syma (Adelpha syma) | ,  N | Gulf Fritillary (Agraulis vanillae) | ,  N | White Peacock (Anartia jatrophae) | ,  N | Bordered (Sunflower) Patch (Chlosyne lacinia) | ,  N | Southern Monarch (Danaus erippus) | ,  N | Julia Heliconian (Dryas iulia) | ,  N | Exquisite Sailor (Dynamine athemon) | ,  N | Euptoieta hortensia (Euptoieta hortensia) | ,  N | Gray Cracker (Hamadryas februa) | ,  N | Blue (Variable) Cracker (Hamadryas feronia) | ,  N | Red Postman (Crimson-patched Longwing) (Heliconius erato) | ,  N | Tropical Buckeye (Junonia evarete) | ,  N | Mangrove Buckeye (Junonia genoveva) | ,  N | Bataraza Butterfly (Ortilia ithra) | ,  N | Splendeuptychia Forster (Splendeuptychia tupinamba) | ,  N | Brazilian Painted Lady (Vanessa braziliensis) | ,  N | Subtropical Lady (Vanessa carye) | ,  N | Abaeis deva (Abaeis deva) | ,  N | Great Southern White (Ascia monuste) | ,  N | Leuce Yellow (Pyrisitia leuce) | ,  N | Mimosa Yellow (Pyrisitia nise) | ,  N | Common White Tatochila (Tatochila mercedis) | ,  N | Little Dancer Metalmark (Riodina lysippoides) | ,  N |
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| CLASS: Dicotyledons (Magnoliopsida) |
| ORDER: Mallows and Relatives (Malvales) (1 Species) | Argentine Mallow (Pavonia cymbalaria) | ,  N |
| ORDER: Myrtle and Relatives (Myrtales) (2 Species) | Chaetogastra gracilis (Chaetogastra gracilis) | ,  N | Ludwigia elegans (Ludwigia elegans) | ,  N |
| ORDER: Pea (Fabales) (1 Species) | Cockspur Coral Tree (Erythrina crista-galli) | ,  N |
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| CLASS: Monocotyledons (Liliopsida) |
| ORDER: Banana and Ginger (Zingiberales) (1 Species) | White Garland-lily (White Ginger Lily) (Hedychium coronarium) | ,  N |
