| Tinamous: Tinamidae |
| 1 | Red-winged Tinamou | Rhynchotus rufescens |
| Screamers: Anhimidae |
| 2 | Southern Screamer | Chauna torquata |
| Ducks: Anatidae |
| 3 | White-faced Whistling-Duck | Dendrocygna viduata |
| 4 | Black-bellied Whistling-Duck | Dendrocygna autumnalis |
| 5 | Fulvous Whistling-Duck | Dendrocygna bicolor |
| 6 | Black-necked Swan | Cygnus melancoryphus |
| 7 | Coscoroba Swan | Coscoroba coscoroba |
| 8 | Comb Duck | Sarkidiornis sylvicola |
| 9 | Ringed Teal | Callonetta leucophrys |
| 10 | Silver Teal | Spatula versicolor |
| 11 | Cinnamon Teal | Spatula cyanoptera |
| 12 | Red Shoveler | Spatula platalea |
| 13 | White-cheeked Pintail | Anas bahamensis |
| 14 | Yellow-billed Pintail | Anas georgica |
| 15 | Yellow-billed Teal | Anas flavirostris |
| 16 | Rosy-billed Pochard | Netta peposaca |
| 17 | Black-headed Duck | Heteronetta atricapilla |
| 18 | Lake Duck | Oxyura vittata |
| Pigeons and Doves: Columbidae |
| 19 | Picazuro Pigeon | Patagioenas picazuro |
| Cuckoos: Cuculidae |
| 20 | Guira Cuckoo | Guira guira |
| Hummingbirds: Trochilidae |
| 21 | Glittering-bellied Emerald | Chlorostilbon lucidus |
| Rails, Gallinules, and Coots: Rallidae |
| 22 | Spotted Rail | Pardirallus maculatus |
| 23 | Plumbeous Rail | Pardirallus sanguinolentus |
| 24 | Red-gartered Coot | Fulica armillata |
| 25 | White-winged Coot | Fulica leucoptera |
| Limpkin: Aramidae |
| 26 | Limpkin | Aramus guarauna |
| Stilts and Avocets: Recurvirostridae |
| 27 | Black-necked Stilt | Himantopus mexicanus |
| Plovers and Lapwings: Charadriidae |
| 28 | Southern Lapwing | Vanellus chilensis |
| 29 | Two-banded Plover | Anarhynchus falklandicus |
| Painted-Snipes: Rostratulidae |
| 30 | South American Painted-Snipe | Nycticryphes semicollaris |
| Sandpipers and Allies: Scolopacidae |
| 31 | Hudsonian Godwit | Limosa haemastica |
| 32 | Solitary Sandpiper | Tringa solitaria |
| 33 | Lesser Yellowlegs | Tringa flavipes |
| 34 | Greater Yellowlegs | Tringa melanoleuca |
| 35 | Stilt Sandpiper | Calidris himantopus |
| 36 | Baird's Sandpiper | Calidris bairdii |
| 37 | White-rumped Sandpiper | Calidris fuscicollis |
| 38 | Pectoral Sandpiper | Calidris melanotos |
| Gulls, Terns, and Skimmers: Laridae |
| 39 | Brown-hooded Gull | Chroicocephalus maculipennis |
| 40 | Gray-hooded Gull | Chroicocephalus cirrocephalus |
| 41 | Snowy-crowned Tern | Sterna trudeaui |
| Flamingos: Phoenicopteridae |
| 42 | Chilean Flamingo | Phoenicopterus chilensis |
| Grebes: Podicipedidae |
| 43 | White-tufted Grebe | Rollandia rolland |
| 44 | Silvery Grebe | Podiceps occipitalis |
| Storks: Ciconiidae |
| 45 | Maguari Stork | Ciconia maguari |
| Cormorants and Shags: Phalacrocoracidae |
| 46 | Neotropic Cormorant | Nannopterum brasilianus |
| Ibises and Spoonbills: Threskiornithidae |
| 47 | White-faced Ibis | Plegadis chihi |
| 48 | Bare-faced Ibis | Phimosus infuscatus |
| 49 | Roseate Spoonbill | Platalea ajaja |
| Herons, Egrets, and Bitterns: Ardeidae |
| 50 | Rufescent Tiger-Heron | Tigrisoma lineatum |
| 51 | Black-crowned Night Heron | Nycticorax nycticorax |
| 52 | Snowy Egret | Egretta thula |
| 53 | Western Cattle-Egret | Bubulcus ibis |
| 54 | Great Egret | Ardea alba |
| 55 | Cocoi Heron | Ardea cocoi |
| Hawks, Eagles, and Kites: Accipitridae |
| 56 | White-tailed Kite | Elanus leucurus |
| 57 | Cinereous Harrier | Circus cinereus |
| Owls: Strigidae |
| 58 | Burrowing Owl | Athene cunicularia |
| Woodpeckers: Picidae |
| 59 | Campo Flicker | Colaptes campestris |
| Falcons and Caracaras: Falconidae |
| 60 | Crested Caracara | Caracara cheriway |
| 61 | Chimango Caracara | Daptrius chimango |
| 62 | American Kestrel | Falco sparverius |
| 63 | Aplomado Falcon | Falco femoralis |
| Parrots: Psittacidae |
| 64 | Monk Parakeet | Myiopsitta monachus |
| Ovenbirds and Woodcreepers: Furnariidae |
| 65 | Wren-like Rushbird | Phleocryptes melanops |
| 66 | Buff-winged Cinclodes | Cinclodes fuscus |
| 67 | Sharp-billed Canastero | Asthenes pyrrholeuca |
| 68 | Bay-capped Wren-Spinetail | Spartonoica maluroides |
| Tyrant Flycatchers: Tyrannidae |
| 69 | Many-colored Rush Tyrant | Tachuris rubrigastra |
| 70 | Crested Doradito | Pseudocolopteryx sclateri |
| 71 | Spectacled Tyrant | Hymenops perspicillatus |
| 72 | Great Kiskadee | Pitangus sulphuratus |
| 73 | Fork-tailed Flycatcher | Tyrannus savana |
| Swallows: Hirundinidae |
| 74 | White-rumped Swallow | Tachycineta leucorrhoa |
| 75 | Barn Swallow | Hirundo rustica |
| Wrens: Troglodytidae |
| 76 | Grass Wren | Cistothorus platensis |
| Mockingbirds and Thrashers: Mimidae |
| 77 | Chalk-browed Mockingbird | Mimus saturninus |
| Old World Sparrows: Passeridae |
| 78 | House Sparrow | Passer domesticus |
| Wagtails and Pipits: Motacillidae |
| 79 | Yellowish Pipit | Anthus chii |
| 80 | Short-billed Pipit | Anthus furcatus |
| 81 | Correndera Pipit | Anthus correndera |
| New World Sparrows: Passerellidae |
| 82 | Grassland Sparrow | Ammodramus humeralis |
| 83 | Rufous-collared Sparrow | Zonotrichia capensis |
| Troupials and Allies: Icteridae |
| 84 | White-browed Meadowlark | Leistes superciliaris |
| 85 | Shiny Cowbird | Molothrus bonariensis |
| 86 | Yellow-winged Blackbird | Agelasticus thilius |
| 87 | Chestnut-capped Blackbird | Chrysomus ruficapillus |
| Tanagers and Allies: Thraupidae |
| 88 | Saffron Finch | Sicalis flaveola |
| 89 | Grassland Yellow-Finch | Sicalis luteola |
| 90 | Great Pampa-Finch | Embernagra platensis |
| 91 | Double-collared Seedeater | Sporophila caerulescens |
Special Birds