The BLACK-WINGED PEACOCK (Pavo nigripennis), a very similar species, differs from the above principally in the blackish blue or blueish green feathers on the upper wing-covers. The hen has a light grey plumage, spotted with a darker shade.
THE JAPAN PEACOCK.
The JAPAN PEACOCK (Pavo muticus, or Pavo spicifer) far exceeds its congeners in beauty. In this bird the body is slender and the foot high. The crest is composed of feathers having broader tips than those in the crest of the Common Peacock. The upper throat and the head are emerald-green; the feathers of the lower throat are adorned with blueish green spots, having golden edges; and the emerald-green breast-feathers gleam with gold. The belly is brownish grey, the wing-covers are dark green, the quills brown, marbled with black and grey on the outer web, and the secondary quills black, with a greenish gloss. The long feathers of the upper tail-covers resemble those of the Common Peacock, but are more gorgeous. The eye is greyish brown, the bare region around blueish green, the cheek brownish yellow, the beak black, and the foot grey. The female resembles her mate, but is without the train.
The earliest description of this splendid bird is given by Aldrovandus, in the sixteenth century; this was taken from a drawing sent some years before by the Emperor of Japan to the Pope, who gave it to his nephew, the Marchese Tachinetti, from whom Aldrovandus received it. On the authority of this author it had been described in several scientific works, till at length, no further knowledge being gained concerning the species, its actual existence began to be doubted, and Cuvier, in his "Règne Animal," says, "Le Paon de Japon, ou Spicifère (P. muticus, Linn.), n'est rien moins qu'authentique. Le veritable Paon sauvage du Japon differe peu du notre, par les couleurs, et point par l'aigrette."
M. Temminck, however, admitted the species, and described it principally from the account of Le Vaillant, who had seen an example of it in a menagerie at the Cape of Good Hope. At the time of the publication of Temminck's work, a specimen was received in the Paris collection, and two males were procured by Professor Jameson for the Ornithological Museum of Edinburgh.
The GUINEA FOWLS (Numidæ) are recognisable by their strongly-built body, short wings, moderate-sized tail, very long feathers in the upper tail-covers, moderate-sized, short-toed feet, without spurs; strong beak, and head and neck more or less denuded of feathers, and decorated with a crest, plume, wreath, or helmet of feathers, and lappets of skin. The plumage of both sexes is usually dark, enlivened with white. The female is adorned with a dress similar to that of her mate.
The ROYAL GUINEA FOWLS (Acryllium) differ in many particulars from all their congeners. These birds have a slender body, long thin neck, small bare head, decorated with a wreath, extending from the ears over the back of the head, and formed of very short velvety feathers; the feathers on the throat are lancet-shaped; the upper secondaries considerably exceed the primaries in length, and the centre tail-feathers are longer than those at the exterior. The short strong beak is much curved, and has the upper mandible very decidedly hooked at its tip; the tarsi are high, and furnished with a spur-like wart. The members of this group are natives of Africa.