Ulieta Starling (Aplonis ulietensis)
The Ulieta Starling, better known as Bay Thrush or Ulieta Thrush, is still one of the biggest mysteries of the ornithological world.
The species is known only on the basis of a drawing which was produced by Georg Forster in 1774 (?), as well as from the appertaining description.
The bird was originally – under reserve – described as thrush (Turdidae), but was subsequently associated with the Honeyeater family (Meliphagidae).
Actually, it may have been a starling, because very similar starling species are well known to occur / have occurred on other, adjacent islands within Central Polynesia (only a single species, the Rarotonga Starling (Aplonis cinerascens Hartlaub & Finsch), is extant), while the other two bird families are not known from that geographical region, neither from historical specimens nor by subfossil remains.
The Ulieta Starling died out sometimes during the 18th century – or – did it survive until the 19th century?
“Some of the land birds which inhabit the more interior and elevated woods have a varied and gaudy plumage; while others, with a more sombre garment, possess a melodious voice, not unlike that of our thrush or blackbird; but neither kind is sufficiently numerous to repay the exertions of the sportsman or ornithologist.”
from: ‘Frederick Debell Bennett: Narrative of a Whaling Voyage round the globe, from the year 1833 to 1836.’
 Frederick Debell Bennett: Narrative of a Whaling Voyage round the globe, from the year 1833 to 1836. Comprising Sketches of Polynesia, California, the Indian Archipelago, etc. with an account of southern whales, the sperm whale fishery, and the natural history of the climates visited. London, Richard Bentley 1840
 Dieter Luther: Die ausgestorbenen Vögel der Welt. Westarp Wissenschaften 1986
 Errol Fuller: Extinct Birds. Penguin Books (England) 1987
Depiction: Georg Forster, 1774
(This image is in the public domain because its copyright has expired.)