Cœligene (Cœligena typica), John Gould Were not the numerous specimens of this bird, which we have of late years received, all perfectly alike, we might naturally suppose that they were birds clothed in an immature dress, or females of some species the males of which were not known; all the bright colour which occurs being on the lower part of the back, and consisting of a metallic lustre on the edges of the rump-feathers, which is only visible in certain lights; late discoveries, however, have made us acquainted with other species of this form, in which a similar style of plumage prevails, and we now find that there is a large group of these plainly-coloured birds, to which, therefore, a distinctive generic title has with propriety been given; all inhabit the great Andean ranges, and one or other of the species is found from the Isthmus of Panama to Bolivia. 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."