Calyptorhynchus banksii -- Red-tailed Black Cockatoo. Alternate name on piece: Calyptorhynchus naso [Western black cockatoo] Strong drawing, the male head fairly well finished; the drawing fills the sheet (48cm) and Gould adds note, "this bird better than 1/2 inch shorter and kept under in size." Artist's name(s): Gould, John; Richter, Henry Constantine.