| Rheas: Rheidae |
| 1 | Greater Rhea | Rhea americana |
| Tinamous: Tinamidae |
| 2 | Quebracho Crested-Tinamou | Eudromia formosa |
| 3 | Brushland Tinamou | Nothoprocta cinerascens |
| 4 | Tataupa Tinamou | Crypturellus tataupa |
| Ducks: Anatidae |
| 5 | White-faced Whistling-Duck | Dendrocygna viduata |
| 6 | Comb Duck | Sarkidiornis sylvicola |
| 7 | Muscovy Duck | Cairina moschata |
| 8 | Ringed Teal | Callonetta leucophrys |
| 9 | Brazilian Teal | Amazonetta brasiliensis |
| 10 | Masked Duck | Nomonyx dominicus |
| Guans, Chachalacas, and Curassows: Cracidae |
| 11 | Chaco Chachalaca | Ortalis canicollis |
| Pigeons and Doves: Columbidae |
| 12 | Rock Pigeon | Columba livia |
| 13 | Pale-vented Pigeon | Patagioenas cayennensis |
| 14 | Picazuro Pigeon | Patagioenas picazuro |
| 15 | Spot-winged Pigeon | Patagioenas maculosa |
| 16 | Ruddy Ground Dove | Columbina talpacoti |
| 17 | Picui Ground Dove | Columbina picui |
| 18 | White-tipped Dove | Leptotila verreauxi |
| 19 | Eared Dove | Zenaida auriculata |
| Cuckoos: Cuculidae |
| 20 | Guira Cuckoo | Guira guira |
| 21 | Smooth-billed Ani | Crotophaga ani |
| 22 | Striped Cuckoo | Tapera naevia |
| 23 | Dark-billed Cuckoo | Coccyzus melacoryphus |
| Nightjars and Allies: Caprimulgidae |
| 24 | Nacunda Nighthawk | Chordeiles nacunda |
| 25 | Lesser Nighthawk | Chordeiles acutipennis |
| 26 | Common Nighthawk | Chordeiles minor |
| 27 | Little Nightjar | Setopagis parvula |
| 28 | Scissor-tailed Nightjar | Hydropsalis torquata |
| 29 | Rufous Nightjar | Antrostomus rufus |
| Potoos: Nyctibiidae |
| 30 | Common Potoo | Nyctibius griseus |
| Swifts: Apodidae |
| 31 | White-collared Swift | Streptoprocne zonaris |
| 32 | Sick's Swift | Chaetura meridionalis |
| Hummingbirds: Trochilidae |
| 33 | Blue-tufted Starthroat | Heliomaster furcifer |
| 34 | Glittering-bellied Emerald | Chlorostilbon lucidus |
| 35 | Gilded Hummingbird | Hylocharis chrysura |
| 36 | White-bellied Hummingbird | Elliotomyia chionogaster |
| Rails, Gallinules, and Coots: Rallidae |
| 37 | Giant Wood-Rail | Aramides ypecaha |
| 38 | Gray-cowled Wood-Rail | Aramides cajaneus |
| 39 | Common Gallinule | Gallinula galeata |
| 40 | Red-fronted Coot | Fulica rufifrons |
| 41 | White-winged Coot | Fulica leucoptera |
| Limpkin: Aramidae |
| 42 | Limpkin | Aramus guarauna |
| Stilts and Avocets: Recurvirostridae |
| 43 | Black-necked Stilt | Himantopus mexicanus |
| Plovers and Lapwings: Charadriidae |
| 44 | Southern Lapwing | Vanellus chilensis |
| 45 | Collared Plover | Anarhynchus collaris |
| Jacanas: Jacanidae |
| 46 | Wattled Jacana | Jacana jacana |
| Sandpipers and Allies: Scolopacidae |
| 47 | Greater Yellowlegs | Tringa melanoleuca |
| Grebes: Podicipedidae |
| 48 | Least Grebe | Tachybaptus dominicus |
| 49 | Pied-billed Grebe | Podilymbus podiceps |
| Storks: Ciconiidae |
| 50 | Maguari Stork | Ciconia maguari |
| 51 | Wood Stork | Mycteria americana |
| Cormorants and Shags: Phalacrocoracidae |
| 52 | Neotropic Cormorant | Nannopterum brasilianus |
| Ibises and Spoonbills: Threskiornithidae |
| 53 | White-faced Ibis | Plegadis chihi |
| 54 | Bare-faced Ibis | Phimosus infuscatus |
| 55 | Plumbeous Ibis | Theristicus caerulescens |
| 56 | Buff-necked Ibis | Theristicus caudatus |
| 57 | Roseate Spoonbill | Platalea ajaja |
| Herons, Egrets, and Bitterns: Ardeidae |
| 58 | Rufescent Tiger-Heron | Tigrisoma lineatum |
| 59 | Black-crowned Night Heron | Nycticorax nycticorax |
| 60 | Whistling Heron | Syrigma sibilatrix |
| 61 | Snowy Egret | Egretta thula |
| 62 | Striated Heron | Butorides striata |
| 63 | Western Cattle-Egret | Bubulcus ibis |
| 64 | Great Egret | Ardea alba |
| 65 | Cocoi Heron | Ardea cocoi |
| New World Vultures: Cathartidae |
| 66 | Black Vulture | Coragyps atratus |
| 67 | Turkey Vulture | Cathartes aura |
| 68 | Lesser Yellow-headed Vulture | Cathartes burrovianus |
| Hawks, Eagles, and Kites: Accipitridae |
| 69 | White-tailed Kite | Elanus leucurus |
| 70 | Hook-billed Kite | Chondrohierax uncinatus |
| 71 | Sharp-shinned Hawk | Accipiter striatus |
| 72 | Cinereous Harrier | Circus cinereus |
| 73 | Crane Hawk | Geranospiza caerulescens |
| 74 | Snail Kite | Rostrhamus sociabilis |
| 75 | Savanna Hawk | Buteogallus meridionalis |
| 76 | Great Black Hawk | Buteogallus urubitinga |
| 77 | Chaco Eagle | Buteogallus coronatus |
| 78 | Roadside Hawk | Rupornis magnirostris |
| 79 | Harris's Hawk | Parabuteo unicinctus |
| 80 | White-tailed Hawk | Geranoaetus albicaudatus |
| 81 | Variable Hawk | Geranoaetus polyosoma |
| 82 | Black-chested Buzzard-Eagle | Geranoaetus melanoleucus |
| 83 | Short-tailed Hawk | Buteo brachyurus |
| 84 | Swainson's Hawk | Buteo swainsoni |
| Owls: Strigidae |
| 85 | Tropical Screech-Owl | Megascops choliba |
| 86 | Great Horned Owl | Bubo virginianus |
| 87 | Ferruginous Pygmy-Owl | Glaucidium brasilianum |
| 88 | Burrowing Owl | Athene cunicularia |
| Kingfishers: Alcedinidae |
| 89 | Ringed Kingfisher | Megaceryle torquata |
| 90 | Amazon Kingfisher | Chloroceryle amazona |
| 91 | Green Kingfisher | Chloroceryle americana |
| Puffbirds: Bucconidae |
| 92 | Spot-backed Puffbird | Nystalus maculatus |
| Woodpeckers: Picidae |
| 93 | White-barred Piculet | Picumnus cirratus |
| 94 | White Woodpecker | Melanerpes candidus |
| 95 | White-fronted Woodpecker | Melanerpes cactorum |
| 96 | Checkered Woodpecker | Veniliornis mixtus |
| 97 | Cream-backed Woodpecker | Campephilus leucopogon |
| 98 | Black-bodied Woodpecker | Dryocopus schulzii |
| 99 | Green-barred Woodpecker | Colaptes melanochloros |
| 100 | Campo Flicker | Colaptes campestris |
| Seriemas: Cariamidae |
| 101 | Black-legged Seriema | Chunga burmeisteri |
| Falcons and Caracaras: Falconidae |
| 102 | Spot-winged Falconet | Spiziapteryx circumcincta |
| 103 | Crested Caracara | Caracara cheriway |
| 104 | Chimango Caracara | Daptrius chimango |
| 105 | American Kestrel | Falco sparverius |
| 106 | Aplomado Falcon | Falco femoralis |
| 107 | Peregrine Falcon | Falco peregrinus |
| Parrots: Psittacidae |
| 108 | Monk Parakeet | Myiopsitta monachus |
| 109 | Scaly-headed Parrot | Pionus maximiliani |
| 110 | Turquoise-fronted Amazon | Amazona aestiva |
| 111 | Green-cheeked Parakeet | Pyrrhura molinae |
| 112 | Blue-crowned Parakeet | Thectocercus acuticaudatus |
| 113 | White-eyed Parakeet | Psittacara leucophthalmus |
| Typical Antbirds: Thamnophilidae |
| 114 | Giant Antshrike | Batara cinerea |
| 115 | Great Antshrike | Taraba major |
| 116 | Variable Antshrike | Thamnophilus caerulescens |
| 117 | Stripe-backed Antbird | Myrmorchilus strigilatus |
| Crescentchests: Melanopareiidae |
| 118 | Olive-crowned Crescentchest | Melanopareia maximiliani |
| Tapaculos: Rhinocryptidae |
| 119 | Crested Gallito | Rhinocrypta lanceolata |
| Ovenbirds and Woodcreepers: Furnariidae |
| 120 | Olivaceous Woodcreeper | Sittasomus griseicapillus |
| 121 | Great Rufous Woodcreeper | Xiphocolaptes major |
| 122 | Red-billed Scythebill | Campylorhamphus trochilirostris |
| 123 | Scimitarbilled Woodcreeper | Drymornis bridgesii |
| 124 | Narrow-billed Woodcreeper | Lepidocolaptes angustirostris |
| 125 | Chaco Earthcreeper | Tarphonomus certhioides |
| 126 | Rufous Hornero | Furnarius rufus |
| 127 | Crested Hornero | Furnarius cristatus |
| 128 | Rufous-fronted Thornbird | Phacellodomus rufifrons |
| 129 | Little Thornbird | Phacellodomus sibilatrix |
| 130 | Lark-like Brushrunner | Coryphistera alaudina |
| 131 | Short-billed Canastero | Asthenes baeri |
| 132 | Stripe-crowned Spinetail | Cranioleuca pyrrhophia |
| 133 | Brown Cacholote | Pseudoseisura lophotes |
| 134 | Sooty-fronted Spinetail | Synallaxis frontalis |
| 135 | Azara's Spinetail | Synallaxis azarae |
| 136 | Pale-breasted Spinetail | Synallaxis albescens |
| Cotingas: Cotingidae |
| 137 | White-tipped Plantcutter | Phytotoma rutila |
| Tityras and Allies: Tityridae |
| 138 | White-naped Xenopsaris | Xenopsaris albinucha |
| 139 | White-winged Becard | Pachyramphus polychopterus |
| 140 | Crested Becard | Pachyramphus validus |
| Tyrant Flycatchers: Tyrannidae |
| 141 | Suiriri Flycatcher | Suiriri suiriri |
| 142 | Pearly-vented Tody-Tyrant | Hemitriccus margaritaceiventer |
| 143 | Ochre-faced Tody-Flycatcher | Poecilotriccus plumbeiceps |
| 144 | Cliff Flycatcher | Hirundinea ferruginea |
| 145 | Southern Beardless-Tyrannulet | Camptostoma obsoletum |
| 146 | Mouse-colored Tyrannulet | Nesotriccus murinus |
| 147 | Yellow-bellied Elaenia | Elaenia flavogaster |
| 148 | Large Elaenia | Elaenia spectabilis |
| 149 | White-crested Elaenia | Elaenia albiceps |
| 150 | Small-billed Elaenia | Elaenia parvirostris |
| 151 | Sooty Tyrannulet | Serpophaga nigricans |
| 152 | White-crested Tyrannulet | Serpophaga subcristata |
| 153 | Straneck's Tyrannulet | Serpophaga griseicapilla |
| 154 | Fulvous-crowned Scrub-Tyrant | Euscarthmus meloryphus |
| 155 | Greater Wagtail-Tyrant | Stigmatura budytoides |
| 156 | Plain Tyrannulet | Inezia inornata |
| 157 | Bran-colored Flycatcher | Myiophobus fasciatus |
| 158 | Euler's Flycatcher | Lathrotriccus euleri |
| 159 | Smoke-colored Pewee | Contopus fumigatus |
| 160 | Fuscous Flycatcher | Cnemotriccus fuscatus |
| 161 | Black Phoebe | Sayornis nigricans |
| 162 | Southern Scrub-Flycatcher | Sublegatus modestus |
| 163 | Vermilion Flycatcher | Pyrocephalus rubinus |
| 164 | Cinereous Tyrant | Knipolegus striaticeps |
| 165 | Spectacled Tyrant | Hymenops perspicillatus |
| 166 | Yellow-browed Tyrant | Satrapa icterophrys |
| 167 | White Monjita | Xolmis irupero |
| 168 | Black-crowned Monjita | Neoxolmis coronatus |
| 169 | Lesser Shrike-Tyrant | Agriornis murinus |
| 170 | Black-backed Water-Tyrant | Fluvicola albiventer |
| 171 | Rufous Casiornis | Casiornis rufus |
| 172 | Swainson's Flycatcher | Myiarchus swainsoni |
| 173 | Brown-crested Flycatcher | Myiarchus tyrannulus |
| 174 | Cattle Tyrant | Machetornis rixosa |
| 175 | Great Kiskadee | Pitangus sulphuratus |
| 176 | Streaked Flycatcher | Myiodynastes maculatus |
| 177 | Variegated Flycatcher | Empidonomus varius |
| 178 | Crowned Slaty Flycatcher | Empidonomus aurantioatrocristatus |
| 179 | Tropical Kingbird | Tyrannus melancholicus |
| 180 | Fork-tailed Flycatcher | Tyrannus savana |
| Vireos, Shrike-Babblers, and Erpornis: Vireonidae |
| 181 | Rufous-browed Peppershrike | Cyclarhis gujanensis |
| 182 | Chivi Vireo | Vireo chiri |
| Crows, Jays, and Magpies: Corvidae |
| 183 | Plush-crested Jay | Cyanocorax chrysops |
| Swallows: Hirundinidae |
| 184 | White-rumped Swallow | Tachycineta leucorrhoa |
| 185 | Gray-breasted Martin | Progne chalybea |
| 186 | Southern Martin | Progne elegans |
| 187 | Brown-chested Martin | Progne tapera |
| 188 | Southern Rough-winged Swallow | Stelgidopteryx ruficollis |
| 189 | Blue-and-white Swallow | Pygochelidon cyanoleuca |
| 190 | Tawny-headed Swallow | Alopochelidon fucata |
| 191 | Barn Swallow | Hirundo rustica |
| Gnatcatchers: Polioptilidae |
| 192 | Masked Gnatcatcher | Polioptila dumicola |
| Wrens: Troglodytidae |
| 193 | Southern House Wren | Troglodytes musculus |
| Mockingbirds and Thrashers: Mimidae |
| 194 | Patagonian Mockingbird | Mimus patagonicus |
| 195 | White-banded Mockingbird | Mimus triurus |
| Thrushes and Allies: Turdidae |
| 196 | Chiguanco Thrush | Turdus chiguanco |
| 197 | Creamy-bellied Thrush | Turdus amaurochalinus |
| 198 | Rufous-bellied Thrush | Turdus rufiventris |
| Old World Sparrows: Passeridae |
| 199 | House Sparrow | Passer domesticus |
| Finches, Euphonias, and Allies: Fringillidae |
| 200 | Hooded Siskin | Spinus magellanicus |
| New World Sparrows: Passerellidae |
| 201 | Grassland Sparrow | Ammodramus humeralis |
| 202 | Moss-backed Sparrow | Arremon doribnii |
| 203 | Rufous-collared Sparrow | Zonotrichia capensis |
| Troupials and Allies: Icteridae |
| 204 | White-browed Meadowlark | Leistes superciliaris |
| 205 | Crested Oropendola | Psarocolius decumanus |
| 206 | Solitary Black Cacique | Cacicus solitarius |
| 207 | Variable Oriole | Icterus pyrrhopterus |
| 208 | Screaming Cowbird | Molothrus rufoaxillaris |
| 209 | Shiny Cowbird | Molothrus bonariensis |
| 210 | Scarlet-headed Blackbird | Amblyramphus holosericeus |
| 211 | Grayish Baywing | Agelaioides badius |
| 212 | Chestnut-capped Blackbird | Chrysomus ruficapillus |
| New World Warblers: Parulidae |
| 213 | Southern Yellowthroat | Geothlypis velata |
| 214 | Tropical Parula | Setophaga pitiayumi |
| 215 | Golden-crowned Warbler | Basileuterus culicivorus |
| 216 | Brown-capped Redstart | Myioborus brunniceps |
| Cardinals and Allies: Cardinalidae |
| 217 | Hepatic Tanager | Piranga flava |
| 218 | Black-backed Grosbeak | Pheucticus aureoventris |
| 219 | Ultramarine Grosbeak | Cyanoloxia brissonii |
| Tanagers and Allies: Thraupidae |
| 220 | Red-crested Cardinal | Paroaria coronata |
| 221 | Blue-and-yellow Tanager | Rauenia bonariensis |
| 222 | Sayaca Tanager | Thraupis sayaca |
| 223 | Black-crested Finch | Lophospingus pusillus |
| 224 | Cinnamon Warbling Finch | Poospiza ornata |
| 225 | Black-and-chestnut Warbling Finch | Poospiza whitii |
| 226 | Ringed Warbling Finch | Poospiza torquata |
| 227 | Black-capped Warbling Finch | Poospiza melanoleuca |
| 228 | Saffron Finch | Sicalis flaveola |
| 229 | Grassland Yellow-Finch | Sicalis luteola |
| 230 | Great Pampa-Finch | Embernagra platensis |
| 231 | Blue-black Grassquit | Volatinia jacarina |
| 232 | Lined Seedeater | Sporophila lineola |
| 233 | Double-collared Seedeater | Sporophila caerulescens |
| 234 | Rusty-collared Seedeater | Sporophila collaris |
| 235 | Band-tailed Seedeater | Catamenia analis |
| 236 | Red-crested Finch | Coryphospingus cucullatus |
| 237 | Dull-colored Grassquit | Asemospiza obscurus |
| 238 | Many-colored Chaco Finch | Saltatricula multicolor |
| 239 | Bluish-gray Saltator | Saltator coerulescens |
| 240 | Golden-billed Saltator | Saltator aurantiirostris |
Special Birds