Graceful Train-bearer (Lesbia gracilis), John Gould This very elegant little species differs from the Lesbia Gouldi in having much narrower tail-feathers, and in the green colouring of the outermost of these feathers being much less extensive; the basal portion of their outer webs is also much lighter, approaching to white: in other respects the two birds are much alike. 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."