Osbert’s Emerald (Chlorostilbon Osberti), John Gould This little Humming-Bird has many characters in common with the Chlorostilbon Caniveti; it displays the same metallic brilliancy on the plumage of its under surface, and is nearly as fine on the crown; but if specimens of the C. Osberti from Dueñas are compared with examples of C. Caniveti from Mexico, it will be very evident that the two birds are distinct. 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."