We had a great trip with Psittacids:

Nanday (Black-hooded) Parakeet
Blaze-winged Parakeet
Monk Parakeet
Blue-crowned Parakeet
White-eyed Parakeet
Peach-fronted Parakeet
Maroon-bellied Parakeet (Atlantic Forest endemic)
Hyacinth Macaw
Red-and-green Macaw
Blue-and-yellow Macaw
Yellow-collared Macaw
Red-shouldered Macaw
Blue-winged Parrotlet
Yellow-chevroned Parakeet
Plain Parakeet (Brazilian Atlantic Forest endemic)
Golden-tailed Parakeet (heard-only unfortunately)
Scaly-headed Parrot
Orange-winged Parrot
Blue-fronted Parrot