The scaly-headed parrot is a species of bird in subfamily Arinae of the family Psittacidae, the African and New World parrots. It is also called scaly-headed pionus, Maximilian pionus, Maximilian parrot, Maximilian's pionus, or Maximilian's parrot. It is found in Brazil, Bolivia, Argentina, and Paraguay.

The red-billed parrot, also known as coral-billed pionus or red-billed pionus, is a species of bird in subfamily Arinae of the family Psittacidae, the African and New World parrots. It is found in Bolivia, Colombia, Ecuador, Peru, and Venezuela.