The GOLDEN EAGLE (_Aquila chrysaëtos_) is much more slenderly built and has a smaller head than the bird above described, but the wings and tail are longer, and the former do not extend as far as the extremity of the tail. The male is three feet long and seven feet and a quarter across the span of the wings; the wing measures two feet four inches and the tail thirteen inches; the female is three feet two inches in length, and seven feet and a half across. The plumage is lighter than that of the Tawny Eagle, and more of a reddish brown upon the breast, hose, and lower tail-covers; the region of the shoulder is indicated by a white spot; the tail is always brownish grey, marked with irregular crooked black lines, and the black stripes are narrower than in the preceding species. All the feathers that compose the tail are of equal length, except the two outer ones, which are somewhat shortened; the lower part of the wing is always very dark, and often entirely without markings. The plumage of the young is darker, and without the white patch in the shoulder, and the reddish-brown feathers on the back of the head and neck, that characterise the adult bird. THE IMPERIAL EAGLE. The IMPERIAL EAGLE (_Aquila imperialis_) is considerably smaller than the preceding, not exceeding two feet and a half to two feet and three-quarters in length; its breadth across the wings is from six to six feet and two-thirds, the wing measures from two, to two feet and a quarter, and the tail from ten, to twelve inches and a half. The female is of the same size as the male Tawny Eagle. The body of this species is compact, and the wings so long that they extend beyond the comparatively short tail. In the adult the plumage is of a dark, somewhat variegated, brown; the head and nape are reddish yellow, and the shoulders are ornamented with a white patch; the tail-feathers are grey, striped with black. The plumage of the young is tawny, marked longitudinally with dark brown. Both the Golden and Tawny Eagles are found throughout all such countries of Europe as possess high mountains or extensive forests, and both are met with in many parts of Asia and North America. The Imperial Eagle, on the contrary, inhabits the south-eastern portion of our continent from Hungary to Mongolia; Jerdon tells us that it not only visits India during its migrations, but breeds there. This last species frequents open tracts of country, whilst the Tawny and Golden Eagles prefer rocky districts, the former always building amongst the mountain fastnesses, and the latter occasionally making her eyrie among the branches of one of the gigantic trees of the forest. The Imperial Eagle also makes its nest upon trees, and often at no great distance from the abodes of man. All these birds have many habits in common; they commence their pursuit of prey long after the sun rises, and confine their excursions within the limits of a certain district. Both mates hunt