Martin:
Take into account the different temperatures you'll find in Argentina.
In
Iguazu you'll find temp. from 25 degrees celsius in the early morning going up to 35 or 40 degrees during the day. You should move ussually until 11 am and then visit a swimmingpool. :egghead:
Best option for birdwatching is paying a little more and staying at the Sheraton hotel inside the park because for the rest of human visitors, the park opens at 8 am (for Argentina). You could walk the Macuco trail early (6 am) in the morning. Nice to visit in the town of Puerto Iguazu (Arg) are two places: Güira Oga and Jardin de Picaflores. The first is a rehabilitation center for raptors and has a nice park for birdwatching. The second one is three blocks away from the bus terminal and is a private garden with feeders for hummingbirds. It's nice to visit if you a few hours with nothing to do.
On the brazilian side you could visit the national park and a bird zoo. Inside the park you could do a trail through the forest. Only way to do it is with a local guide. Before entering the national park you'll find 'Parque das Aves' which is a bird zoo. Nice for seeing some birds like the Harpy Eagle.
If you hired a car you could visit another park called Uruguai which lies a 70 Km south from Puerto Iguazu. You must take the national route 12 to the town Wanda and from there the route 19 to Andresito. Another options with a car is to drive through the national park taking the route 101 to Andresito. You could stop whenever you want.
In
Buenos Aires you'll find temperatures between 20 and 35 degrees celsius. Best place to visit is the Costanera Sur Reserve. Here a webpage made by a group of friends:
www.costanera.se
Opens at 8 am and closes at 7 pm.
In
Peninsula Valdez you'll find temperatures between 10 and 25 degrees celsius. The best solutions is to hire a car and visit all the coast near the town of Puerto Madryn and the peninsula. To the south you'll find a bog Magellanic Penguin colony at Punta Tombo.
In
Tierra del Fuego temperatures will be between minus 5 and 10 degrees celsius.