This section is from the book "The Speaking Parrots: A Scientific Manual", by Dr. Karl Russ. Also available from Amazon: The Speaking Parrots.
Psittacus melanorrhynchus, Wgl.
The Black-billed Alexandrine Parrakeet (Ger., Schwarz-schndbeliger Edelsittich mit rother Brust, Schwarzschnabel-sittich; Fr., Perruche Alexandre a bee noir; Dut., Zwartbek Edelparkiet, Smous-of Baardparkiet) - Distinctive Marks.
By Blyth and Jerdon this species was considered to be the female, or young, of the one just described; but after it had been described by Wagler, in 1832, from a living specimen in the possession of the King of Bavaria, it was determined by Finsch to be a distinct variety. Fraser also considered it to be a separate species (1850), and described it as such. It bears a strong resemblance to the two foregoing, and can be distinguished only by the following marks: The narrow band on the forehead and the lorum stripe, as well as the broad stripe on the chin under the lower mandible, deep sooty-black; forehead greenish-blue; crown of the head violet-blue; stripe above and below the eye, extending each side as far as the nostril, yellowish-green; the part behind the eye marked with violet undulatory lines; the cheeks and the part round the ear blue; a flesh-coloured stripe extends from the front of the throat round the cheeks as far as the middle of the back of the head; the nape light yellowish-green; spot on the shoulder small, oblong, dark olive-greenish yellow; the reverse side of the tail a dull olive-greenish yellow; the whole of the upper parts of the body green, the same colour as the two preceding species; the beak a shining brownish-black; the cere bluish-grey; eyes pearl-white; iris grey, with large black pupils; feet bluish-grey; claws bluish horn-grey. Size exactly the same as the Rose-breasted Alexandrine Parrakeet.
We have no knowledge as to the country it inhabits nor of its mode of life. Black-billed Alexandrine Parrakeets are frequently seen in the market and at bird shows.
 
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