The Periquito Tuim (Forpus xanthopterygius) also called Periquito, Cuiuba, Periquitinho, Pacu, Papacu or Tuim is found in Atlantic Forest biome. It is the smallest bird in the family of parrots and parakeets, totally green color, a little darker on the back. It measures 12 inches. They nests in hollow trees, using empty nests of Sabiá. They live in flocks of up to 20 parakeets and are grouped in pairs.