You are right Linda.As we are at the Southern Hemisphere It is warmer as you go North. There are far more hummingbirds in the North of the country than here. The province of Misiones is in the North of Argentina and has a subtropical weather (you can visit Iguazu Falls there) . They say there are 16 kind of hummingbirds in that area.
There is a garden at a private home there. They hung feeders in that garden and lots of hummingbirds visit that garden.
I've search for a video of that place in you tube. Here it is.
http://www.youtube.com/watch?v...
