It had a very restricted natural habitat due to its dependence on the tree for nesting, feeding and roosting. The species inhabited riparian Caraibeira ( Tabebuia aurea) woodland galleries in the drainage basin of the Rio São Francisco within the Caatinga dry forest climate of interior northeastern Brazil. Males and females are almost identical in appearance however, the females are slightly smaller. Its appearance is various shades of blue, with a grey-blue head, light blue underparts, and vivid blue upperparts. The bird is a medium-size parrot weighing about 300 grams (11 oz), smaller than most of the large macaws. This bird has been completely extirpated from its natural range, and following a several-year survey, the IUCN officially declared it extinct in the wild in 2019. It was first described by German naturalist Georg Marcgrave, when he was working in the State of Pernambuco, Brazil in 1638 and it is named for German naturalist Johann Baptist von Spix, who collected a specimen in 1819 on the bank of the Rio São Francisco in northeast Bahia in Brazil.
It is a member of tribe Arini in the subfamily Arinae ( Neotropical parrots), part of the family Psittacidae (the true parrots). Spix's macaw ( Cyanopsitta spixii), also known as the little blue macaw, is a macaw species that was endemic to Brazil. Ara hyacinthinus Spix, 1824 (preoccupied).
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