Bourcier’s Hermit (Phaëthornis Bourcieri), John Gould I believe Cayenne to be the native country of this species of Phaëthornis, which, although assimilating in colour to many of its allies, may be readily distinguished by the nearly straight form of its bill and by the almost uniform greyish white tint of the throat and under surface; in size it is much smaller than P. superciliosus or P. Eurynome. 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."