Tschudi’s Wood-Nymph (Thalurania Tschudii), John Gould The present bird would appear, at a first glance, to be identical either with the Thalurania furcata or T. refulgens; but when compared with those species, it is found to present many differences. 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."