Population justification
Any remaining population is assumed to be tiny (numbering fewer than 50 individuals and mature individuals), based on the disappearance of the last known individual.
Ecology
It apparently requires gallery woodland dominated by caraiba Tabebuia caraiba trees for nesting, but feeds mainly on two regionally characteristic Euphorbiaceae plant species. Breeding occurs during the austral summer. Two or three eggs are laid in the wild (up to five in captivity). The wild bird and the P. maracana apparently produced infertile eggs, although one experienced very early embryo death, subsequent DNA analysis revealing a hybrid.