Deville’s Amazili (Amazilia Devillei), John Gould In order to effect a correct determination of many species of this group of birds, I have found it absolutely necessary to examine the typical specimens from which the original descriptions were taken,—a task of no ordinary difficulty, distributed as they are among our own and the Continental museums, both public and private. 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."