_Aquila albirostris_, Vieill. 2nde Edit, du Nouv. Dict. d’Hist. Nat., tom. i. p. 229.—Ib. Ency. Méth. Orn., 3ieme part, p. 1191? _Wol-dja_, Aborigines of the mountain and lowland districts of Western Australia. _Eagle Hawk_, Colonists of New South Wales. This noble bird is so universally spread over the southern portion of Australia, that it is quite unnecessary for me to enter more minutely into detail respecting the extent of its range, than to say that it is equally distributed over the whole of the country from Swan River on the west to Moreton Bay on the east; it is also as numerous in Van Diemen’s Land, and on all the larger islands in Bass’s Straits, being of course more plentiful in such districts as are suited to its habits, and where the character of the country is congenial to the animals upon which it subsists. I have not yet seen it in any collection, either from the northern portion of Australia or any other country. In all probability it will hereafter be found to extend its range as far towards the tropics in the southern hemisphere as the Golden Eagle (_Aquila chrysaëta_) does in the northern: the two birds are, in fact, beautiful analogues of each other in their respective habitats, and doubtless perform similar offices in the great scheme of creation. All that has been said by previous writers respecting the courage, power and rapacity of the one applies with equal force to the other; in size they are also nearly alike, but the lengthened and wedge-shaped form of its tail gives to the Australian bird a far more pleasing and elegant contour.