We took the general tour to the waterfall and a pretty easy trail in the late morning. As such, we didn't really rack up the species list but still saw some cool things.
mangrove black hawk
white-throated shrike tanager
I talked to a guide there who mentioned Sirena is the place to stay for a few days for good birding. There's a lodge there that can be booked in advance with meals; I'd love to do a more rugged trip next visit!