Chequered Violet-Ear (Petasophora coruscans), John Gould Or this beautiful bird a single example only is contained in my collection; I obtained it of Mr. Leadbeater, who, I regret to say, could give me no information whatever respecting it. This illustration has been restored to its original vibrancy by enhancing colors and removing unwanted marks. A monograph of the Trochilidæ, or family of humming-birds was published between 1849 and 1887 by English ornithologist John Gould. This monumental work depicts and describes all the known species of hummingbirds at the time - comprising 418 lithographic plates and information on 537 species."