Coral-billed Amazili (Amazilia corallirostris), John Gould Few of the Humming-birds are more plainly coloured than the Amazilia corallirostris; the tints of the under surface, from the chin to the lower part of the abdomen, being uniform sandy-buff, while on the crown and all the upper surface, a similar uniformity of tint, although of a different hue, prevails; the chestnut-red tail, too, is only relieved by the bronzy tipping of the feathers. 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."