Emerald-fronted Humming-Bird (Iölaima frontalis), John Gould When I first received this fine bird from Mr. Lawrence of New York, a question arose in my mind as to whether it were not the I. Schreibersi in a more fully adult state of plumage than I had yet seen; I was the more inclined to think this might be the case from the circumstance of one of Mr. Lawrence’s specimens, which is evidently immature, being so like the I. Schreibersi that it is difficult to say to which species the individual pertains. 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."