Fancy

1. I think the extent of rufous look in range for Blue-tailed based off of images on eBird. Tail shape, with the longer central feathers, all supports Blue-tailed. 2. I can't really help with this one, but it does seem that Kentish Plovers usually have darker legs, and these ones are pretty pale. 3. Strikes me as a Wood Sandpiper 4. First impression was some accipiter, but I can't find a perfect match on eBird...

Blue Whistling-Thrush is a much better suggestion for #4! I think that's a good fit.

I would agree with Yellow-bellied Seedeater.

Structurally it strikes me as a House Sparrow, so maybe one that's been stained?

1. Ruff 2-3. Indian Chat perhaps? Also known as Brown Rock Chat. 4. Maybe the same as above. 5. Domestic swan geese

1. Scaly-breasted Thrasher 2-3. House Sparrows 4. Well it looks like a mockingbird, and the only one on Curacao is Tropical Mockingbird. Maybe a little disheveled? Doesn't look like a typical Tropical to me. 5. I think it looks better for a Saffron Finch, or some other finch (St. Lucia has Grassland Yellow-Finches).

I think Scaly-headed Parrot matches the best -- especially with the bright red vent, and some of the scaly patterning is visible in the head. It looks as if they vary quite a bit with the amount of blue in the head and white around the eye. Iguazu Falls is too far south for Blue-headed Parrots as well.

Both appear to be Canivet's Emeralds.

1 and 2 look correct. 3 looks better for a young Eurasian Blackbird. 4. Young Eurasian Sparrowhawk, probably

32. some kind of Elaenia... probably Yellow-bellied Elaenia, but I'm not confident on that. 33. Black-and-white Warbler 34. female Summer Tanager I believe 35. Myiarchus species (a genus of flycatchers)... I personally won't be able to identify this. 36. White-eared Ground-Sparrow 37. Rufous-collared Sparrow

30. Purple-throated Mountain-gem. Location always helps, but turns out female White-bellied Mountain-gems actually look considerably different, and there are just mis-identified photos online. 31. Common Tody-Flycatcher

26. I think this could fit Green-crowned Brilliant better, just as there isn't much copper in the rump and the tail has a more bluish iridescence. I personally probably can't put a confident ID on it just with the back though. 29 is a juvenile Green-crowned Brilliant. What was the location for #30? It's a female mountain-gem, and they have pretty distinct ranges to help separate them.

25. Sooty-faced Finch 27. Looks like it. 28. Coppery-headed Emerald I can look at the others later today unless IvoryBillHope beats me to them.

Olive-backed and Yellow-crowned are the only euphonias supposed to be in that park according to eBird, so I think that Olive-backed is a safe bet. 17. Looks good for a Rufous-tailed Hummingbird.

Short tail and brighter colour favour White-bellied (as does frequency in that park).