Charles’s Comet (Cometes? Caroli), John Gould If ever a Humming-Bird perplexed the mind of the Trochilidist, it is the species figured on the accompanying Plate, masmuch as it presents the colouring of a male with the form and contour of a female; of its history unfortunately we know nothing; and as all the specimens I have seen are alike, we have no means of determining if there exist any difference in the outward appearance of the sexes of this anomalous bird. 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."