Cocoi Heron. This one is pretty much like a Great Blue Heron with a white neck.
Green Ibis. Mostly black, really. My book says the call sounds like someone starting a moped.
Great Black-Hawk. Although I really love this pic of it:
Short-tailed Hawk. Black above, white below. Unless it’s the all-black form, and then you’re kind of screwed.
Slaty-breasted Wood-rail. Another double-hyphenated species. And it’s a rail. With any luck I can see some rails that my friend Bill the rail expert has never seen.
Blackish Rail. Not sure how you tell this from the Slaty-Breasted Wood-Rail. And why “blackish”? Wouldn’t “gray” do as well? Birdforum says of the Slaty-Breasted Wood-Rail that “The bill is shorter and thicker than the superficially similar Blackish Rail, which also lack the brown tones to the upperside.”
Okay, enough for now.