ton, that by a superficial observer they might be confounded, at least were he to view them separately.
The White-tailed or Cinereous Eagle (Falco Albicilla of Linnæus), has, when full grown, the bill and iris yellow, the general colour of the upper parts pale greyish-brown, passing into wood-brown, the belly and thighs chocolate-brown, some of the upper tail-coverts, and the whole of the tail, white. In this state, it is sufficiently different from our bird, at least in colouring, but the young has a different appearance. In the bird just fully fledged, the bill is deep brown, tinged with blue, its base and the cere greenish-yellow; the iris dark brown; the feet gamboge-yellow; the head deep brown, the bases of all the feathers of the body white; on the hind neck the whole feathers white, excepting the ends which are deep brown; the upper and middle back light brown, the tips umber; the lower back white, with umber tips; the tail greyish at its origin, deep brown, with an irregular brownish-white patch along the inner webs, the fore-neck and upper breast brownish-white, spotted with umber, the tips being of the latter colour; the belly pale brown, spotted with umber; the thighs brown; the under tail-coverts whitish, tipped with deep brown. In this state, and until nearly full grown, it has been described as a distinct species, under the name of Sea Eagle or Osprey (Falco Ossiƒragus, Linn.).
The principal changes which take place in regard to colour as the bird advances, are these: the bill first becomes bluish-black, and ultimately yellow, the cere becomes brighter, the iris assumes more of yellow, the white at the base of the plumage gradually disappears, the tail becomes lighter, the general colour of the plumage at first darker, but ultimately paler. At the age of two years, the only period when the bird much resembles ours, it is as follows:—and here I shall make the description correspond in its arrangement with that of the Bird of Washington, that the two may be more satisfactorily compared.
The bill corresponds with that of our bird, only that it is not so deep, and proportionally more elongated. The other circumstances mentioned in the first paragraph of the description of the Bird of Washington are the same in the Sea Eagle.
Plumage compact, imbricated, glossy; feathers of the head, neck and breast, narrow and pointed; of the back, breast and belly, ovate, distinct, acute; the wing-coverts ovate and pointed. Space between the beak and eye barish, being sparsely covered with bristly feathers. Eyebrow pro-
