Pied-tailed Humming-Bird (Phlogophilus hemileucurus), John Gould Besides the birds which I have described and figured in the present monograph, I have in my collection several which are either in a state of immaturity or in such a mutilated condition that I have not ventured to write or figure from such imperfect materials. 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."