Sula sula -- Red-footed Booby, Bobo pata roja, Fou à pieds rouges. Alternate name on piece: Sula piscator [Red-legged gannet] Rough sketch by Gould; layout and bird positions retained in published plate. Interesting sequence: Gould's sketches here and at Gould item 1531, Richter's development at Gould item 1519, and the published plate. Artist's name(s): Gould, John; Richter, Henry Constantine.