Lovely report, thank you for sharing! SE Brazil is absolutely fantastic, and I still need to get to a couple of the major sites... somehow I've managed to spend roughly 6 yrs in S America and have still not seen your two Cotingas or some of the other specials!
A couple pedantic spelling / naming corrections that hopefully are more helpful than nitpicky
Dec 12: Bertoni's Antbird and Ochre-rumped Antbird on Dec 12. And yes, both are are skulkers that can be hard to get good looks at, as with almost all Drymophila.
Dec 13: Sepia-capped Flycatcher and the name of White-browed Blackbird (along with Red-breasted) has changed to White-browed Meadowlark but I think IOC is lagging on this English name change?
Dec 14: Collared Swift is White-collared Swift, I assume...
Dec 15: Blue-billed Black-Tyrant and Velvety Black-Tyrant
Dec 17: Silvery-flanked Antwren - Here it is SACC/Clements that seems to be slow in taking up this split
Great report, reminds me of the trip I had planned for next year but had to cancel due to work constraints. I plan to someday make it to Itororo Lodge and bird the Atlantic Forest, though I doubt I'll have 10 days to do it like you.
Thanks everyone, also for the nomenclature input. I did joke a bit about how nearly everything had Ant in the name and how many variations of Rufous, Rufescent, Rusty, Chestnut... takes some digesting!
It was really good, I think my lack of experience in the area was a setback for being able to focus quickly on some of the harder birds as such a large amount was new. If you go with some experience and some of them already under your belt, I'm sure you'll find even more that I didn't see.
Trystan, certainly a wonderful selection of birds you saw in a region of the world on my shortlist of most wanted destinations. I have birded NE Argentina by Iguazu which hosts an appetizer of Atlantic Forest birding but not yet had the chance to visit Brazil. Awesome!