Buff-tailed Velvet-breast (Lafresnaya flavicaudata), John Gould Not only are the Columbian Andes most fertile in species of Humming-birds, but, in many instances, forms there occur which do not exist elsewhere; and the genus Lafresnaya may be cited as one of such genera, of which two, if not three, well-defined species have been discovered, and which are true Andean birds. 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."