If you never been in South America before, Iguazu area has a lot to offer (not only the amazing falls, certainly the world´s largest!) but the amazing Atlantic rainforest and its myriads of birds, from hummingbirds (at the hummingbird garden attending the feeders) to colorful green-headed tanagers, trogons, several woodcreepers (study them before!), blond-crested woodpecker and many others such as the ochre-collared piculet and yes the antbirds! If you stay at the 600 area (600 hectares of pristine rainforest where several hotels are located, birding will be from your room window! and night birding will be easy too with chances for tropical screech-owl, gray potoo, pauraque and other nightjars. The falls itself are an spectacle not to be missed.
Devote at least three nights there with two full days to visit the National Park (1 day), Urugua-í State Park (1 day), the hummingbird garden (1 afternoon), the Ruta 101 (1 morning).
Day 1 - Arrival at Puerto Iguazu, leave you stuff in the hotel and bird the adjacent area and if time allows visit the hummingbird garden. Owling.
Day 2 - Full day at the National Park, AM birding the Macuco trail, have lunch the barbeque restaurant and afternoon visit the falls.
Day 3 - Full day at Urugua-í State Park. To visit the area requires a 60km drive go and the same back. You can stay as long as possible there, you can take a lunch box or return to the small town of Puerto Esperanza to have lunch and then back to Puerto Iguazu and use the afternoon to visit the hummingbird garden in case your connection was not good the first day.
Day 4 - Birding the Ruta 101, back for breakfast at hotel and then go to the airport. If you flight is at afternoon, you can even consider to cross the border and visit the Brazilian side of the falls.
This is a teaser video from what you can see in a tour like this, certainly you can see far more species than you can film or photograph