Noctua (constellation)
Noctua (Latin: "owl") was a constellation near the tail of Hydra in the southern celestial hemisphere, but is no longer recognized. It was introduced by Alexander Jamieson in his 1822 work, "A Celestial Atlas", and appeared in a derived collection of illustrated cards, "Urania's Mirror". Now designated Asterism "a", the owl was composed of the stars 4 Librae and 54–57 Hydrae, which range from 4th to 6th magnitude. The French astronomer Pierre Charles Le Monnier had introduced a bird on Hydra's tail as the constellation Solitaire, named for the extinct flightless bird, the Rodrigues solitaire, but  the image was that of a rock thrush which had been classified in the genus "Turdus", giving rise to the constellation name Turdus Solitarius, the solitary thrush. It has also been depicted as a mockingbird. The boundaries of the constellation were defined as longitude 0° to 26°30' and from the ecliptic to 15° S.