The taxonomy and nomenclature of Pyrrhura parakeets can be complicated. This is nowhere more evident than in the case of the populations, such as the Santarem Parakeet, that formerly were classified as subspecies of the Painted Parakeet (Pyrrhura picta). The Santarem Parakeet is composed of two subspecies that are distributed in central Amazonian Brazil, south of the Amazon River, from the drainage of the Rio Madeira east to the east bank of the Rio Tocantins, and also on the north bank of the Amazon, east of Manaus. In common with many other Pyrrhura parakeets, especially within the Painted and the Maroon-faced (Pyrrhura leucotis) parakeet groups, the Santarem Parakeet is mostly green with whitish auriculars, which form a pale patch on the sides of the head. The tail and the center of the belly are red. The head is mostly dark brown. The Santarem Parakeet is distinguished from the Painted Parakeet of the Guianan region by the absence of red on the carpal region of the wing. Painted Parakeet also has a more extensive area of blue on the forecrown; blue is less extensive (subspecies amazonum, eastern Amazonia) or absent (subspecies snethlageae, Rio Madeira) on the forecrown in the Santarem. The Santarem Parakeet is very similar to the Bonaparte's Parakeet (Pyrrhura lucianii) of western Amazonia, which also lacks blue on the forecrown. The Santarem Parakeet is widespread and fairly common in lowland evergreen forest, but the biology of this species is very poorly known.