Waterton’s Wood Nymph (Thalurania Watertoni), John Gould Whether the Trochilidæ are less numerous in Demerara than in other parts of South America, and whether they have been less attended to, are questions I am unable to answer; certain it is that we possess but a limited knowledge of the species inhabiting that country. 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."