For those willing to go to Alantic Forest
I have good news:
There is a type of bamboo flowering (merostachys sp.) right now
Which means that there will be plenty of birds this year's end. This is one of the best time for birding in Atlantic Forest.
This phenomenon occured nearly 30 years ago and according to the information that we have, and probably it will take another 30 years again.
During the seeding bamboo you can see many species related to bamboo such as Spotted Bamboowren, Uniform Finch, Sooty Grassquit and large flocks of Buff-fronted Seedeater.
I hope that helps you all