Jelski’s Copper-tail (Metallura jelskii / heterocerca), John Gould This species was discovered in Peru by the celebrated Polish traveller whose name it bears, and by whom it was met with in the high mountains near Lake Junin, between Cucas and Paleamayo. 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."