| Spotted Nothura | Nothura maculosa | Seen on the way to San Rafael |
| Pied-billed Grebe | Podilymbus podiceps | |
| Neotropic Cormorant | Phalacrocorax brasilianus | |
| Great Egret | Ardea alba | |
| Snowy Egret | Egretta thula | |
| Cattle Egret | Bubulcus ibis | |
| Black-crowned Night-Heron | Nycticorax nycticorax | |
| Rufescent Tiger-Heron | Tigrisoma lineatum | |
| Black Vulture | Coragyps atratus | |
| Long-winged Harrier | Circus buffoni | |
| Savanna Hawk | Buteogallus meridionalis | |
| Roadside Hawk | Buteo magnirostris | |
| Black-and-white Hawk-Eagle | Spizastur melanoleucus | |
| Southern Caracara | Caracara plancus | |
| Yellow-headed Caracara | Milvago chimachima | |
| Chimango Caracara | Milvago chimango | Seen on the way to San Rafael |
| American Kestrel | Falco sparverius | |
| Spot-winged Wood-Quail | Odontophorus capueira | |
| Common Moorhen | Gallinula chloropus | |
| White-backed Stilt | Himantopus melanurus | Seen on the way to San Rafael |
| Southern Lapwing | Vanellus chilensis | |
| South American Snipe | Gallinago paraguaiae | |
| Rock Pigeon | Columba livia | Introduced species |
| Picazuro Pigeon | Patagioenas picazuro | |
| Eared Dove | Zenaida auriculata | |
| Ruddy Ground-Dove | Columbina talpacoti | |
| Picui Ground-Dove | Columbina picui | |
| White-tipped Dove | Leptotila verreauxi | |
| Gray-fronted Dove | Leptotila rufaxilla | Possibly heard |
| Yellow-chevroned Parakeet | Brotogeris chiriri | |
| Squirrel Cuckoo | Piaya cayana | |
| Smooth-billed Ani | Crotophaga ani | |
| Guira Cuckoo | Guira guira | |
| Pavonine Cuckoo | Dromococcyx pavoninus | Heard only |
| Burrowing Owl | Athene cunicularia | |
| Gray-rumped Swift | Chaetura cinereiventris | |
| Scale-throated Hermit | Phaethornis eurynome | |
| Plovercrest | Stephanoxis lalandi | |
| Surucua Trogon | Trogon surrucura | |
| Amazon Kingfisher | Chloroceryle amazona | |
| Saffron Toucanet | Baillonius bailloni | Near-threatened |
| Ochre-collared Piculet | Picumnus temminckii | |
| White Woodpecker | Melanerpes candidus | |
| White-spotted Woodpecker | Veniliornis spilogaster | |
| Green-barred Woodpecker | Colaptes melanochloros | Seen on the way to San Rafael |
| Campo Flicker | Colaptes campestris | |
| Rufous Hornero | Furnarius rufus | |
| Rufous-capped Spinetail | Synallaxis ruficapilla | |
| Gray-bellied Spinetail | Synallaxis cinerascens | |
| Buff-fronted Foliage-gleaner | Philydor rufus | Possibly seen |
| Ochre-breasted Foliage-gleaner | Philydor lichtensteini | |
| Thrush-like Woodcreeper | Dendrocincla turdina | |
| Olivaceous Woodcreeper | Sittasomus griseicapillus | |
| Lesser Woodcreeper | Xiphorhynchus fuscus | |
| Spot-backed Antshrike | Hypoedaleus guttatus | |
| Tufted Antshrike | Mackenziaena severa | |
| Variable Antshrike | Thamnophilus caerulescens | |
| Plain Antvireo | Dysithamnus mentalis | |
| Rufous-winged Antwren | Herpsilochmus rufimarginatus | |
| White-shouldered Fire-eye | Pyriglena leucoptera | |
| Short-tailed Antthrush | Chamaeza campanisona | Heard only |
| Rufous Gnateater | Conopophaga lineata | Possibly heard |
| Greenish Schiffornis | Schiffornis virescens | |
| Southern Beardless-Tyrannulet | Camptostoma obsoletum | |
| Yellow Tyrannulet | Capsiempis flaveola | |
| Gray Elaenia | Myiopagis caniceps | Possibly seen |
| White-crested Tyrannulet | Serpophaga subcristata | |
| Sepia-capped Flycatcher | Leptopogon amaurocephalus | |
| Bay-ringed Tyrannulet | Phylloscartes sylviolus | Near-threatened |
| Rough-legged Tyrannulet | Phyllomyias burmeisteri | Possibly seen |
| Eared Pygmy-Tyrant | Myiornis auricularis | |
| Drab-breasted Bamboo-Tyrant | Hemitriccus diops | |
| White-throated Spadebill | Platyrinchus mystaceus | |
| Cattle Tyrant | Machetornis rixosus | |
| Sirystes | Sirystes sibilator | Heard only |
| Great Kiskadee | Pitangus sulphuratus | |
| Social Flycatcher | Myiozetetes similis | |
| Yellowish Pipit | Anthus lutescens | |
| House Wren | Troglodytes aedon | |
| Chalk-browed Mockingbird | Mimus saturninus | |
| Rufous-bellied Thrush | Turdus rufiventris | |
| Pale-breasted Thrush | Turdus leucomelas | |
| Creamy-bellied Thrush | Turdus amaurochalinus | |
| Creamy-bellied Gnatcatcher | Polioptila lactea | Near-threatened |
| Plush-crested Jay | Cyanocorax chrysops | |
| Rufous-browed Peppershrike | Cyclarhis gujanensis | |
| Tropical Parula | Parula pitiayumi | |
| Golden-crowned Warbler | Basileuterus culicivorus | |
| White-rimmed Warbler | Basileuterus leucoblepharus | |
| Chestnut-vented Conebill | Conirostrum speciosum | |
| Chestnut-headed Tanager | Pyrrhocoma ruficeps | |
| Guira Tanager | Hemithraupis guira | |
| White-lined Tanager | Tachyphonus rufus | Possibly seen |
| Black-goggled Tanager | Trichothraupis melanops | |
| Red-crowned Ant-Tanager | Habia rubica | |
| Violaceous Euphonia | Euphonia violacea | |
| Saffron Finch | Sicalis flaveola | |
| White-browed Blackbird | Sturnella superciliaris | |
| Screaming Cowbird | Molothrus rufoaxillaris | Possibly seen |
| Red-rumped Cacique | Cacicus haemorrhous | |
| Yellow-rumped Marshbird | Pseudoleistes guirahuro | Seen on the way to San Rafael |
| Scarlet-headed Blackbird | Amblyramphus holosericeus | Seen on the way to San Rafael |
| Chopi Blackbird | Gnorimopsar chopi | |
| House Sparrow | Passer domesticus | Introduced species |
| Least Grebe | Tachybaptus dominicus | |
| Whistling Heron | Syrigma sibilatrix | |
| Black Vulture | Coragyps atratus | |
| Snail Kite | Rostrhamus sociabilis | |
| Roadside Hawk | Buteo magnirostris | |
| Yellow-headed Caracara | Milvago chimachima | |
| Chimango Caracara | Milvago chimango | |
| Limpkin | Aramus guarauna | |
| Wattled Jacana | Jacana jacana | |
| Southern Lapwing | Vanellus chilensis | |
| Large-billed Tern | Phaetusa simplex | |
| Picui Ground-Dove | Columbina picui | |
| White-tipped Dove | Leptotila verreauxi | |
| Gray-fronted Dove | Leptotila rufaxilla | |
| Blue-winged Parrotlet | Forpus xanthopterygius | |
| Yellow-chevroned Parakeet | Brotogeris chiriri | |
| Scaly-headed Parrot | Pionus maximiliani | |
| Squirrel Cuckoo | Piaya cayana | |
| Smooth-billed Ani | Crotophaga ani | |
| Guira Cuckoo | Guira guira | |
| Striped Cuckoo h | Tapera naevia | |
| Glittering-bellied Emerald | Chlorostilbon aureoventris | |
| Gilded Sapphire | Hylocharis chrysura | |
| White-tailed Goldenthroat | Polytmus guainumbi | |
| White-barred Piculet | Picumnus cirratus | |
| Green-barred Woodpecker | Colaptes melanochloros | |
| Campo Flicker | Colaptes campestris | |
| Rufous Hornero | Furnarius rufus | |
| Greater Thornbird | Phacellodomus ruber | |
| Narrow-billed Woodcreeper | Lepidocolaptes angustirostris | |
| Barred Antshrike | Thamnophilus doliatus | |
| Variable Antshrike | Thamnophilus caerulescens | |
| Sooty Tyrannulet | Serpophaga nigricans | |
| Bran-colored Flycatcher | Myiophobus fasciatus | |
| Cattle Tyrant | Machetornis rixosus | |
| Great Kiskadee | Pitangus sulphuratus | |
| Social Flycatcher | Myiozetetes similis | |
| Three-striped Flycatcher | Conopias trivirgata | |
| Gray-breasted Martin | Progne chalybea | |
| Thrush-like Wren | Campylorhynchus turdinus | |
| House Wren | Troglodytes aedon | |
| Masked Gnatcatcher | Polioptila dumicola | |
| Plush-crested Jay | Cyanocorax chrysops | |
| Rufous-browed Peppershrike | Cyclarhis gujanensis | |
| Masked Yellowthroat | Geothlypis aequinoctialis | |
| Golden-crowned Warbler | Basileuterus culicivorus | |
| Chestnut-vented Conebill | Conirostrum speciosum | |
| Ruby-crowned Tanager | Tachyphonus coronatus | Possibly seen |
| Red-crested Finch | Coryphospingus cucullatus | |
| Saffron Finch | Sicalis flaveola | |
| Red-crested Cardinal | Paroaria coronata | |
| Rufous-collared Sparrow | Zonotrichia capensis | |
| Glaucous-blue Grosbeak | Cyanoloxia glaucocaerulea | Possibly seen |
| Screaming Cowbird | Molothrus rufoaxillaris | Possibly seen |
| Epaulet Oriole | Icterus cayanensis | |
| Red-rumped Cacique | Cacicus haemorrhous | |
| Scarlet-headed Blackbird | Amblyramphus holosericeus | |
| Hooded Siskin | Carduelis magellanica | |
| House Sparrow | Passer domesticus | Introduced species |
| Greater Rhea | Rhea americana | Near-threatened |
| Red-winged Tinamou | Rhynchotus rufescens | |
| Pied-billed Grebe | Podilymbus podiceps | |
| Neotropic Cormorant | Phalacrocorax brasilianus | |
| Whistling Heron | Syrigma sibilatrix | |
| Cocoi Heron | Ardea cocoi | |
| Great Egret | Ardea alba | |
| Snowy Egret | Egretta thula | |
| Cattle Egret | Bubulcus ibis | |
| Black-crowned Night-Heron | Nycticorax nycticorax | |
| Rufescent Tiger-Heron | Tigrisoma lineatum | |
| Maguari Stork | Ciconia maguari | |
| Bare-faced Ibis | Phimosus infuscatus | |
| White-faced Ibis | Plegadis chihi | |
| Roseate Spoonbill | Platalea ajaja | |
| Southern Screamer | Chauna torquata | |
| Black-bellied Whistling-Duck | Dendrocygna autumnalis | |
| Brazilian Teal | Amazonetta brasiliensis | |
| Silver Teal | Anas versicolor | |
| Black Vulture | Coragyps atratus | |
| Lesser Yellow-headed Vulture | Cathartes burrovianus | |
| Snail Kite | Rostrhamus sociabilis | |
| Long-winged Harrier | Circus buffoni | |
| Savanna Hawk | Buteogallus meridionalis | |
| Black-collared Hawk | Busarellus nigricollis | |
| Roadside Hawk | Buteo magnirostris | |
| Southern Caracara | Caracara plancus | |
| Yellow-headed Caracara | Milvago chimachima | |
| Chimango Caracara | Milvago chimango | |
| American Kestrel | Falco sparverius | |
| Aplomado Falcon | Falco femoralis | |
| Chaco Chachalaca | Ortalis canicollis | |
| Limpkin | Aramus guarauna | |
| Giant Wood-Rail | Aramides ypecaha | |
| Common Moorhen | Gallinula chloropus | |
| Wattled Jacana | Jacana jacana | |
| White-backed Stilt | Himantopus melanurus | |
| Southern Lapwing | Vanellus chilensis | |
| South American Snipe | Gallinago paraguaiae | |
| Large-billed Tern | Phaetusa simplex | |
| Picazuro Pigeon | Patagioenas picazuro | |
| Eared Dove | Zenaida auriculata | |
| Picui Ground-Dove | Columbina picui | |
| White-tipped Dove | Leptotila verreauxi | |
| Monk Parakeet | Myiopsitta monachus | |
| Blue-fronted Parrot | Amazona aestiva | |
| Squirrel Cuckoo | Piaya cayana | |
| Smooth-billed Ani | Crotophaga ani | |
| Guira Cuckoo | Guira guira | |
| Burrowing Owl | Athene cunicularia | |
| Ringed Kingfisher | Ceryle torquatus | |
| Amazon Kingfisher | Chloroceryle amazona | |
| Green Kingfisher | Chloroceryle americana | |
| Toco Toucan | Ramphastos toco | |
| White Woodpecker | Melanerpes candidus | |
| Campo Flicker | Colaptes campestris | |
| Rufous Hornero | Furnarius rufus | |
| Sooty-fronted Spinetail | Synallaxis frontalis | |
| Yellow-chinned Spinetail | Certhiaxis cinnamomea | |
| Greater Thornbird | Phacellodomus ruber | |
| Firewood-gatherer | Anumbius annumbi | |
| Scimitar-billed Woodcreeper | Drymornis bridgesii | Possibly seen |
| Narrow-billed Woodcreeper | Lepidocolaptes angustirostris | |
| Sooty Tyrannulet | Serpophaga nigricans | |
| Pearly-vented Tody-Tyrant | Hemitriccus margaritaceiventer | |
| Vermilion Flycatcher | Pyrocephalus rubinus | |
| Gray Monjita | Xolmis cinerea | |
| White Monjita | Xolmis irupero | |
| Spectacled Tyrant | Hymenops perspicillatus | |
| Streamer-tailed Tyrant | Gubernetes yetapa | |
| Cattle Tyrant | Machetornis rixosus | |
| Great Kiskadee | Pitangus sulphuratus | |
| Social Flycatcher | Myiozetetes similis | |
| Gray-breasted Martin | Progne chalybea | |
| White-winged Swallow | Tachycineta albiventer | Possibly seen |
| White-rumped Swallow | Tachycineta leucorrhoa | |
| Tawny-headed Swallow | Alopochelidon fucata | |
| Yellowish Pipit | Anthus lutescens | Heard only |
| House Wren | Troglodytes aedon | |
| Chalk-browed Mockingbird | Mimus saturninus | |
| Rufous-bellied Thrush | Turdus rufiventris | |
| Creamy-bellied Thrush | Turdus amaurochalinus | |
| Masked Gnatcatcher | Polioptila dumicola | |
| Plush-crested Jay | Cyanocorax chrysops | |
| Tropical Parula | Parula pitiayumi | |
| Sayaca Tanager | Thraupis sayaca | |
| Burnished-buff Tanager | Tangara cayana | Possibly seen |
| Black-capped Warbling-Finch | Poospiza melanoleuca | |
| Rusty-collared Seedeater | Sporophila collaris | |
| Saffron Finch | Sicalis flaveola | |
| Great Pampa-Finch | Embernagra platensis | |
| Red-crested Cardinal | Paroaria coronata | |
| Yellow-billed Cardinal | Paroaria capitata | Possibly seen |
| Grassland Sparrow | Ammodramus humeralis | Possibly seen |
| Rufous-collared Sparrow | Zonotrichia capensis | |
| Grayish Saltator | Saltator coerulescens | Possibly seen |
| Unicolored Blackbird | Agelasticus cyanopus | |
| Golden-winged Cacique | Cacicus chrysopterus | |
| Yellow-rumped Marshbird | Pseudoleistes guirahuro | |
| Scarlet-headed Blackbird | Amblyramphus holosericeus | |
| Chopi Blackbird | Gnorimopsar chopi | |
| House Sparrow | Passer domesticus | Introduced species |
| Greater Rhea | Rhea americana | Near-threatened |
| Tataupa Tinamou | Crypturellus tataupa | |
| Brushland Tinamou | Nothoprocta cinerascens | |
| Spotted Nothura | Nothura maculosa | |
| Least Grebe | Tachybaptus dominicus | |
| Pied-billed Grebe | Podilymbus podiceps | |
| White-tufted Grebe | Rollandia rolland | |
| Silvery Grebe | Podiceps occipitalis | |
| Neotropic Cormorant | Phalacrocorax brasilianus | |
| Whistling Heron | Syrigma sibilatrix | |
| Cocoi Heron | Ardea cocoi | |
| Great Egret | Ardea alba | |
| Snowy Egret | Egretta thula | |
| Cattle Egret | Bubulcus ibis | |
| Black-crowned Night-Heron | Nycticorax nycticorax | |
| Wood Stork | Mycteria americana | |
| Maguari Stork | Ciconia maguari | |
| Jabiru | Jabiru mycteria | |
| Plumbeous Ibis | Theristicus caerulescens | |
| Buff-necked Ibis | Theristicus caudatus | |
| Bare-faced Ibis | Phimosus infuscatus | |
| White-faced Ibis | Plegadis chihi | |
| Roseate Spoonbill | Platalea ajaja | |
| Chilean Flamingo | Phoenicopterus chilensis | Near-threatened |
| Southern Screamer | Chauna torquata | |
| Fulvous Whistling-Duck | Dendrocygna bicolor | |
| White-faced Whistling-Duck | Dendrocygna viduata | |
| Black-bellied Whistling-Duck | Dendrocygna autumnalis | |
| Coscoroba Swan | Coscoroba coscoroba | |
| Ringed Teal | Callonetta leucophrys | |
| Brazilian Teal | Amazonetta brasiliensis | |
| White-cheeked Pintail | Anas bahamensis | |
| Silver Teal | Anas versicolor | |
| Rosy-billed Pochard | Netta peposaca | |
| Black Vulture | Coragyps atratus | |
| Turkey Vulture | Cathartes aura | |
| Lesser Yellow-headed Vulture | Cathartes burrovianus | |
| Snail Kite | Rostrhamus sociabilis | |
| Great Black-Hawk | Buteogallus urubitinga | |
| Savanna Hawk | Buteogallus meridionalis | |
| Black-collared Hawk | Busarellus nigricollis | |
| Roadside Hawk | Buteo magnirostris | |
| White-tailed Hawk | Buteo albicaudatus | |
| Southern Caracara | Caracara plancus | |
| Yellow-headed Caracara | Milvago chimachima | |
| Chimango Caracara | Milvago chimango | |
| American Kestrel | Falco sparverius | |
| Aplomado Falcon | Falco femoralis | |
| Chaco Chachalaca | Ortalis canicollis | |
| Limpkin | Aramus guarauna | |
| Giant Wood-Rail | Aramides ypecaha | |
| Common Moorhen | Gallinula chloropus | |
| White-winged Coot | Fulica leucoptera | |
| Wattled Jacana | Jacana jacana | |
| White-backed Stilt | Himantopus melanurus | |
| Southern Lapwing | Vanellus chilensis | |
| Collared Plover | Charadrius collaris | |
| Greater Yellowlegs | Tringa melanoleuca | |
| Lesser Yellowlegs | Tringa flavipes | |
| White-rumped Sandpiper | Calidris fuscicollis | |
| Wilson's Phalarope | Phalaropus tricolor | |
| Franklin's Gull | Larus | |
| Large-billed Tern | Phaetusa simplex | |
| Black Skimmer | Rynchops niger | |
| Picazuro Pigeon | Patagioenas picazuro | |
| Eared Dove | Zenaida auriculata | |
| Picui Ground-Dove | Columbina picui | |
| White-tipped Dove | Leptotila verreauxi | |
| Monk Parakeet | Myiopsitta monachus | |
| Blue-fronted Parrot | Amazona aestiva | |
| Guira Cuckoo | Guira guira | |
| Great Horned Owl | Bubo virginianus | |
| Ferruginous Pygmy-Owl | Glaucidium brasilianum | Possibly seen |
| Burrowing Owl | Athene cunicularia | |
| Nacunda Nighthawk | Podager nacunda | |
| Scissor-tailed Nightjar | Hydropsalis torquata | |
| Glittering-bellied Emerald | Chlorostilbon aureoventris | |
| Amazon Kingfisher | Chloroceryle amazona | |
| White-fronted Woodpecker | Melanerpes cactorum | |
| Checkered Woodpecker | Picoides mixtus | |
| Green-barred Woodpecker | Colaptes melanochloros | |
| Chaco Earthcreeper | Ochetorhynchus certhioides | |
| Rufous Hornero | Furnarius rufus | Seen on the way to Loma Plata |
| Crested Hornero | Furnarius cristatus | |
| Chotoy Spinetail | Schoeniophylax phryganophila | |
| Sooty-fronted Spinetail | Synallaxis frontalis | |
| Pale-breasted Spinetail | Synallaxis albescens | Heard only |
| Stripe-crowned Spinetail | Cranioleuca pyrrhophia | |
| Yellow-chinned Spinetail | Certhiaxis cinnamomea | |
| Lesser Canastero | Asthenes pyrrholeuca | |
| Short-billed Canastero | Asthenes baeri | |
| Common Thornbird | Phacellodomus rufifrons | |
| Little Thornbird | Phacellodomus sibilatrix | |
| Firewood-gatherer | Anumbius annumbi | Heard only |
| Lark-like Brushrunner | Coryphistera alaudina | |
| Scimitar-billed Woodcreeper | Drymornis bridgesii | |
| Narrow-billed Woodcreeper | Lepidocolaptes angustirostris | |
| Great Antshrike | Taraba major | |
| Barred Antshrike | Thamnophilus doliatus | |
| Stripe-backed Antbird | Myrmorchilus strigilatus | |
| Southern Beardless-Tyrannulet | Camptostoma obsoletum | |
| Grey-capped Tyrannulet | Serpophaga | |
| White-bellied Tyrannulet | Serpophaga munda | Possibly seen |
| Suiriri Flycatcher | Suiriri suiriri | |
| Greater Wagtail-Tyrant | Stigmatura budytoides | |
| Pearly-vented Tody-Tyrant | Hemitriccus margaritaceiventer | |
| Vermilion Flycatcher | Pyrocephalus rubinus | |
| Gray Monjita | Xolmis cinerea | |
| White Monjita | Xolmis irupero | |
| Cinereous Tyrant | Knipolegus striaticeps | |
| Spectacled Tyrant | Hymenops perspicillatus | |
| Cattle Tyrant | Machetornis rixosus | |
| Great Kiskadee | Pitangus sulphuratus | |
| White-rumped Swallow | Tachycineta leucorrhoa | |
| Yellowish Pipit | Anthus lutescens | Heard only |
| House Wren | Troglodytes aedon | |
| Chalk-browed Mockingbird | Mimus saturninus | |
| White-banded Mockingbird | Mimus triurus | |
| Rufous-bellied Thrush | Turdus rufiventris | |
| Creamy-bellied Thrush | Turdus amaurochalinus | |
| Masked Gnatcatcher | Polioptila dumicola | |
| Plush-crested Jay | Cyanocorax chrysops | |
| Rufous-browed Peppershrike | Cyclarhis gujanensis | |
| Tropical Parula | Parula pitiayumi | |
| Hepatic Tanager | Piranga flava | |
| Blue-and-yellow Tanager | Thraupis bonariensis | |
| Many-colored Chaco-Finch | Saltatricula multicolor | |
| Red-crested Finch | Coryphospingus cucullatus | |
| Ringed Warbling-Finch | Poospiza torquata | |
| Black-capped Warbling-Finch | Poospiza melanoleuca | |
| Saffron Finch | Sicalis flaveola | |
| Red-crested Cardinal | Paroaria coronata | |
| Grassland Sparrow | Ammodramus humeralis | |
| Rufous-collared Sparrow | Zonotrichia capensis | |
| Golden-billed Saltator | Saltator aurantiirostris | |
| Ultramarine Grosbeak | Cyanocompsa brissonii | |
| Unicolored Blackbird | Agelasticus cyanopus | |
| Chestnut-capped Blackbird | Chrysomus ruficapillus | |
| White-browed Blackbird | Sturnella superciliaris | |
| Bay-winged Cowbird | Molothrus badius | |
| Screaming Cowbird | Molothrus rufoaxillaris | Possibly seen |
| Shiny Cowbird | Molothrus bonariensis | |
| Epaulet Oriole | Icterus cayanensis | |
| Solitary Cacique | Cacicus solitarius | |
| Chopi Blackbird | Gnorimopsar chopi | |
| Orange-backed Troupial | Icterus croconotus | Heard only |
| House Sparrow | Passer domesticus | Introduced species |