Though the species was later moved to the genus Psittacula, genetic studies have led some researchers to suggest it should belong in a reinstated Palaeornis along with the closely related Alexandrine parakeet (P. eupatria) of Asia.

Little is known regarding the bird's habits, but they were presumably similar to those of the Alexandrine parakeet, associating in groups in forests, and making flights between communal roost sites and feeding areas.

[9] The American ornithologist James Greenway stated in 1967 that while the Seychelles parakeet closely resembled the parrots of the Mascarene Islands, it belonged in the Asiatic group that lacks a rosy collar.

[11] While the Australian ornithologist Joseph M. Forshaw listed the bird as a full species in 1973, the British writer Errol Fuller did not consider this justifiable in 2000.

He concluded that it and the Mascarene Psittacula species had a probable ancestor related to the Alexandrine parakeet, and that these islands became dead ends for parrot colonisation across the Indian Ocean because they did not continue further west.

[16] To solve the issue, the German ornithologist Michael P. Braun and colleagues proposed in 2016 and 2019 that Psittacula should be split into multiple genera.

They suggested that Psittaculinae originated in the Australo–Pacific region (then part of the supercontinent Gondwana), and that the ancestral population of the Psittacula–Mascarinus lineage were the first psittaculines in Africa by the late Miocene (8–5 million years ago), and colonised the Mascarenes from there.

[6] The male was generally green, slightly paler and more yellowish on the underparts, with the back of the head, nape, and narrow stripes on the cheeks washed with pale blue.

It had a broad, black cheek-stripe (also termed a band or incomplete collar) and an obscure, narrow line from the cere (the bare patch around the nostrils) to the eye.

[3] The British artist Marianne North worked on the Seychelles from 1883 to 1884, where she produced at least 46 paintings, mainly depicting botanical subjects, but also some animals.

Apart from a few mentions, her animal paintings from the Seychelles were neglected in the literature until 2013, when the British ecologist Anthony S. Cheke discussed them in depth and identified the depicted species.

The depicted birds were a captive male and juvenile (shown with the tropical American plant Caesalpinia pulcherrima) that had been brought to Mahé from Silhouette, kept by the British medical officer James Brooks and his wife.

[6] The Seychelles parakeet lived in native forest, but as that was cleared, adapted to open, cultivated areas, and its diet included fruit.

[4]Hume pointed out that the remarks about their "stupidity" was a reflection of their island tameness, and that the pigeons mentioned may have been Malagasy turtle doves (Nesoenas picturata).

They were settled by the French in 1768, and native forest was subsequently destroyed, which coincided with the decline of endemic birds and the success of introduced species.

[8] While the British ornithologist Desmond Vesey-Fitzgerald was unable to find birds in the 1930s (though he found a small population of the Seychelles black parrot on Praslin),[23] Peters speculated in 1937 that they still survived on Silhouette.

[4] Forshaw stated in 2017 that the species probably disappeared some time after the last specimen was collected in 1893 and before Nicoll's 1906 visit when no birds were reported.