D’Ocai’s Amazili (Amazilia Ocai), John Gould The only example I have yet seen of this very distinct species of Humming-Bird was obtained at Xalapa in Southern Mexico, by M. Rafael Montes d’Oca. 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."