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See this triplist in printable PDF format with media only on page 1.

This one's flashy enough to distract anyone from the falls: Plush-crested Jay! (Photo by participant Ken Havard)
Iguazu Falls belongs to the very exclusive club of the biggest waterfalls in the world, being the longest of them all and probably the most spectacular, too. These alone are good enough reasons to come visit this site, one of the greatest natural wonders on Earth. The falls are also surrounded by 868 square miles of preserved forest both on the Brazilian side and the Argentine side, making this a wonderful birding destination -- and one we explored extremely well this trip, spending two nights in each country that claims a piece of the falls.
We started our tour on the Brazilian side, where we stayed at the luxurious Hotel das Cataratas, although the real luxury was our proximity to the falls (I could hear the roar of the falls from my room!). It was also fun to use an electrical cart-and-trailer to visit the Pouco Preto Trail , and this allowed us to cover 10 miles of forest and dig up a lot of special birds such as the colorful Band-tailed Manakin, the rare Russet-winged Spadebill, the minute Southern Bristle-Tyrant, and several Atlantic forest endemics including Spot-billed Toucanet, Robust Woodpecker, Rufous-capped Motmot, and Rusty-breasted Nunlet.
We then moved on to Argentina, where we had the privilege of access to Argentina's most popular tourist attraction, the Devil's Throat, before the general public's arrival. This allowed us to bird at our own pace as we looked for rarities such as the endangered Black-fronted Piping-Guan before the masses arrived and scared all the birds away. We continued to enjoy some world-class birding with great looks at Creamy-bellied Gnatcatchers, Short-tailed Antthrush, Chestnut-headed Tanager, Pearly-breasted Cuckoo, and many more.
This was truly a fantastic experience, and I hope you all enjoyed it as much as I did. Till we meet again!
--Marcelo
KEYS FOR THIS LIST
One of the following keys may be shown in brackets for individual species as appropriate: * = heard only, I = introduced, E = endemic, N = nesting, a = austral migrant, b = boreal migrant
Cracidae (Guans, Chachalacas, and Curassows)
DUSKY-LEGGED GUAN (Penelope obscura)
BLACK-FRONTED PIPING-GUAN (Pipile jacutinga)
Phalacrocoracidae (Cormorants and Shags)
NEOTROPIC CORMORANT (Phalacrocorax brasilianus)
Anhingidae (Anhingas)
ANHINGA (Anhinga anhinga)
Ardeidae (Herons, Egrets, and Bitterns)
COCOI HERON (Ardea cocoi)
GREAT EGRET (Ardea alba)

A highlight of our extension was getting to walk right up to the edge of this, the Devil's Throat, early in the morning when no other visitors were around. (Photo by participant Ken Havard)
CATTLE EGRET (Bubulcus ibis) STRIATED HERON (Butorides striata)
WHISTLING HERON (Syrigma sibilatrix)
Threskiornithidae (Ibises and Spoonbills)
GREEN IBIS (Mesembrinibis cayennensis)
Cathartidae (New World Vultures)
BLACK VULTURE (Coragyps atratus)
TURKEY VULTURE (Cathartes aura)
KING VULTURE (Sarcoramphus papa)
Accipitridae (Hawks, Eagles, and Kites)
SNAIL KITE (Rostrhamus sociabilis)
PLUMBEOUS KITE (Ictinia plumbea)
ROADSIDE HAWK (Rupornis magnirostris)
Aramidae (Limpkin)
LIMPKIN (Aramus guarauna)
Charadriidae (Plovers and Lapwings)
SOUTHERN LAPWING (Vanellus chilensis)
Scolopacidae (Sandpipers and Allies)
SPOTTED SANDPIPER (Actitis macularius)
Columbidae (Pigeons and Doves)
ROCK PIGEON (Columba livia)
PALE-VENTED PIGEON (Patagioenas cayennensis)
PLUMBEOUS PIGEON (Patagioenas plumbea)
EARED DOVE (Zenaida auriculata)
RUDDY GROUND-DOVE (Columbina talpacoti)
BLUE GROUND-DOVE (Claravis pretiosa) [*]
WHITE-TIPPED DOVE (Leptotila verreauxi)
GRAY-FRONTED DOVE (Leptotila rufaxilla) [*]
VIOLACEOUS QUAIL-DOVE (Geotrygon violacea) [*]
RUDDY QUAIL-DOVE (Geotrygon montana)
Cuculidae (Cuckoos)
SQUIRREL CUCKOO (Piaya cayana)
PEARLY-BREASTED CUCKOO (Coccyzus euleri)
GUIRA CUCKOO (Guira guira)
GREATER ANI (Crotophaga major)
SMOOTH-BILLED ANI (Crotophaga ani)
Strigidae (Owls)
LONG-TUFTED SCREECH-OWL (Megascops sanctaecatarinae) [E*]
FERRUGINOUS PYGMY-OWL (Glaucidium brasilianum)
Caprimulgidae (Nightjars and Allies)
COMMON PAURAQUE (Nyctidromus albicollis)
Apodidae (Swifts)

Planalto Hermit, showing off its distinctive rufous rump. (Photo by participant Ken Havard)
GREAT DUSKY SWIFT (Cypseloides senex) Trochilidae (Hummingbirds)
BLACK JACOBIN (Florisuga fusca) [E]
PLANALTO HERMIT (Phaethornis pretrei)
BLACK-THROATED MANGO (Anthracothorax nigricollis)
GLITTERING-BELLIED EMERALD (Chlorostilbon lucidus)
SWALLOW-TAILED HUMMINGBIRD (Eupetomena macroura)
VIOLET-CAPPED WOODNYMPH (Thalurania glaucopis) [E]
VERSICOLORED EMERALD (Amazilia versicolor)
GLITTERING-THROATED EMERALD (Amazilia fimbriata)
GILDED HUMMINGBIRD (Hylocharis chrysura)
Trogonidae (Trogons)
GREEN-BACKED TROGON (Trogon viridis) [*]
BLACK-THROATED TROGON (Trogon rufus chrysochloros) [E]
Momotidae (Motmots)
RUFOUS-CAPPED MOTMOT (Baryphthengus ruficapillus) [E]
Alcedinidae (Kingfishers)
RINGED KINGFISHER (Megaceryle torquata)
AMAZON KINGFISHER (Chloroceryle amazona)
Bucconidae (Puffbirds)
RUSTY-BREASTED NUNLET (Nonnula rubecula)
Ramphastidae (Toucans)
CHESTNUT-EARED ARACARI (Pteroglossus castanotis)
SPOT-BILLED TOUCANET (Selenidera maculirostris) [E]
TOCO TOUCAN (Ramphastos toco)
RED-BREASTED TOUCAN (Ramphastos dicolorus) [E]
Picidae (Woodpeckers)
OCHRE-COLLARED PICULET (Picumnus temminckii) [E]
GREEN-BARRED WOODPECKER (Colaptes melanochloros melanochloros)
BLOND-CRESTED WOODPECKER (Celeus flavescens) [E]
ROBUST WOODPECKER (Campephilus robustus) [E]
Falconidae (Falcons and Caracaras)
SOUTHERN CARACARA (Caracara plancus)

Black-fronted Piping Guan with a large chick near the falls (Photo by participant Ken Havard)
YELLOW-HEADED CARACARA (Milvago chimachima) BAT FALCON (Falco rufigularis)
PEREGRINE FALCON (Falco peregrinus)
Psittacidae (Parrots)
MAROON-BELLIED PARAKEET (Pyrrhura frontalis) [*]
WHITE-EYED PARAKEET (Aratinga leucophthalma)
BLUE-WINGED PARROTLET (Forpus xanthopterygius)
PLAIN PARAKEET (Brotogeris tirica) [E*]
SCALY-HEADED PARROT (Pionus maximiliani)
Thamnophilidae (Typical Antbirds)
SPOT-BACKED ANTSHRIKE (Hypoedaleus guttatus) [E]
VARIABLE ANTSHRIKE (Thamnophilus caerulescens caerulescens)
PLAIN ANTVIREO (Dysithamnus mentalis)
RUFOUS-WINGED ANTWREN (Herpsilochmus rufimarginatus rufimarginatus) [E]
STREAK-CAPPED ANTWREN (Terenura maculata) [E]
WHITE-SHOULDERED FIRE-EYE (Pyriglena leucoptera) [E]
Conopophagidae (Gnateaters)
RUFOUS GNATEATER (Conopophaga lineata)
Formicariidae (Antthrushes)
SHORT-TAILED ANTTHRUSH (Chamaeza campanisona campanisona)
Furnariidae (Ovenbirds and Woodcreepers)
OLIVACEOUS WOODCREEPER (OLIVACEOUS) (Sittasomus griseicapillus sylviellus) [E]
PLAIN-BROWN WOODCREEPER (PLAIN-WINGED) (Dendrocincla fuliginosa turdina) [E]
STREAKED XENOPS (Xenops rutilans)
RUFOUS HORNERO (Furnarius rufus)
OCHRE-BREASTED FOLIAGE-GLEANER (Philydor lichtensteini) [E]
BLACK-CAPPED FOLIAGE-GLEANER (Philydor atricapillus) [E*]
WHITE-EYED FOLIAGE-GLEANER (Automolus leucophthalmus) [E]
OLIVE SPINETAIL (Cranioleuca obsoleta) [*]
Tyrannidae (Tyrant Flycatchers)
SOUTHERN BEARDLESS-TYRANNULET (Camptostoma obsoletum)
YELLOW-BELLIED ELAENIA (Elaenia flavogaster)
SEPIA-CAPPED FLYCATCHER (Leptopogon amaurocephalus)
SOUTHERN BRISTLE-TYRANT (Phylloscartes eximius)
SOUTHERN ANTPIPIT (Corythopis delalandi)
YELLOW-OLIVE FLYCATCHER (SOORETAMA) (Tolmomyias sulphurescens sulphurescens) [E]

Another section of the falls, which wrap around for more than 2.5 kilometers (Photo by participant Ken Havard)mteters
RUSSET-WINGED SPADEBILL (Platyrinchus leucoryphus) EULER'S FLYCATCHER (Lathrotriccus euleri) [*]
FUSCOUS FLYCATCHER (FUSCOUS) (Cnemotriccus fuscatus fuscatus) [E]
LONG-TAILED TYRANT (Colonia colonus)
CATTLE TYRANT (Machetornis rixosa)
SIRYSTES (EASTERN) (Sirystes sibilator sibilator)
SHORT-CRESTED FLYCATCHER (Myiarchus ferox)
GREAT KISKADEE (Pitangus sulphuratus)
BOAT-BILLED FLYCATCHER (Megarynchus pitangua)
SOCIAL FLYCATCHER (Myiozetetes similis)
TROPICAL KINGBIRD (Tyrannus melancholicus)
FORK-TAILED FLYCATCHER (Tyrannus savana)
Pipridae (Manakins)
WHITE-BEARDED MANAKIN (Manacus manacus)
SWALLOW-TAILED MANAKIN (Chiroxiphia caudata) [E]
BAND-TAILED MANAKIN (Pipra fasciicauda)
WING-BARRED PIPRITES (Piprites chloris) [*]
Vireonidae (Vireos)
RED-EYED VIREO (MIGRATORY CHIVI) (Vireo olivaceus chivi)
Corvidae (Crows, Jays, and Magpies)
PLUSH-CRESTED JAY (Cyanocorax chrysops)
Hirundinidae (Swallows)
SOUTHERN ROUGH-WINGED SWALLOW (Stelgidopteryx ruficollis)
GRAY-BREASTED MARTIN (Progne chalybea)
WHITE-WINGED SWALLOW (Tachycineta albiventer)
Troglodytidae (Wrens)
HOUSE WREN (Troglodytes aedon)
Polioptilidae (Gnatcatchers)
CREAMY-BELLIED GNATCATCHER (Polioptila lactea)
Turdidae (Thrushes and Allies)
PALE-BREASTED THRUSH (Turdus leucomelas)
RUFOUS-BELLIED THRUSH (Turdus rufiventris)
Mimidae (Mockingbirds and Thrashers)
CHALK-BROWED MOCKINGBIRD (Mimus saturninus)
Parulidae (New World Warblers)
TROPICAL PARULA (Setophaga pitiayumi)
GOLDEN-CROWNED WARBLER (Basileuterus culicivorus)
Thraupidae (Tanagers and Allies)
CHESTNUT-HEADED TANAGER (Pyrrhocoma ruficeps)
BLACK-GOGGLED TANAGER (Trichothraupis melanops)
RUBY-CROWNED TANAGER (Tachyphonus coronatus) [E]
SAYACA TANAGER (Thraupis sayaca)
GREEN-HEADED TANAGER (Tangara seledon) [E]
SWALLOW TANAGER (Tersina viridis)
BLUE DACNIS (Dacnis cayana)
GUIRA TANAGER (Hemithraupis guira)
CHESTNUT-VENTED CONEBILL (Conirostrum speciosum)
SAFFRON FINCH (Sicalis flaveola)
BLUE-BLACK GRASSQUIT (Volatinia jacarina)
RUSTY-COLLARED SEEDEATER (Sporophila collaris)
CHESTNUT-BELLIED SEED-FINCH (Oryzoborus angolensis)
RED-CRESTED FINCH (Coryphospingus cucullatus)
BANANAQUIT (Coereba flaveola)
BUFF-THROATED SALTATOR (Saltator maximus)
Emberizidae (Buntings and New World Sparrows)
RUFOUS-COLLARED SPARROW (Zonotrichia capensis)
Cardinalidae (Cardinals and Allies)
RED-CROWNED ANT-TANAGER (Habia rubica)
Icteridae (Troupials and Allies)
WHITE-BROWED BLACKBIRD (Sturnella superciliaris)
SHINY COWBIRD (Molothrus bonariensis)
GIANT COWBIRD (Molothrus oryzivorus)
EPAULET ORIOLE (Icterus cayanensis)
RED-RUMPED CACIQUE (Cacicus haemorrhous)
Fringillidae (Siskins, Crossbills, and Allies)
PURPLE-THROATED EUPHONIA (Euphonia chlorotica)
VIOLACEOUS EUPHONIA (Euphonia violacea)
CHESTNUT-BELLIED EUPHONIA (Euphonia pectoralis) [E]
Passeridae (Old World Sparrows)
HOUSE SPARROW (Passer domesticus)
BROWN CAPUCHIN (Cebus apella)
AZARA'S AGOUTI (Dasyprocta azarae)
SOUTH AMERICAN COATI (Nasua nasua)
BRAZILIAN TAPIR (Tapirus terrestris)
Totals for the tour: 147 bird taxa and 4 mammal taxa