The discovery in western America of the Californian Vulture, second in size only to the great Condor of the Andes; of the Ferrugineous Buzzard, _Archibuteo ferrugineus_, one of the handsomest of the American Falcons; of the Burrowing Owl, a very remarkable species which lives in holes in the ground; of the Little Californian Owl, _Athene infuscata_, the most diminutive of its family yet discovered in the United States, and of other curious species, may be regarded as affording an indication of the interesting results in this group of birds which will reward the future labours of naturalists and travellers in those vast and diversified regions. The bird which is the subject of our present article is the largest and most powerful of the Eagles. It is a native of the remote sea-coasts of northern Asia and America, and has been especially observed in the group or girdle of islands which extends from one continent to the other. It also, very probably, extends its range into the interior of Russian America, and possibly southward, in the winter season, into Oregon and California. In size, and in the strength of its beak and talons, this gigantic Eagle far surpasses any other of its tribe. The Golden Eagle, and the White-headed Eagle, are comparatively insignificant; and if its habits correspond to its powerful organization, as may safely be presumed, it is one of the most destructive of the rapacious birds. It appears, however, like other species of its genus, to prey principally on fishes, which are caught either by its own exertions, or appropriated summarily by the right of the strongest, from the acquisitions of more expert or more successful fishermen. Though, like the White-headed or Bald Eagle, the range of this extraordinary bird may be very extensive, yet the solitudes of the extreme northern parts of the two continents appear to be its proper home; where, it has been fully demonstrated, that although the resident animals of the land are necessarily restricted in numbers, the sea teems with multitudes of inhabitants. There, in the bleak regions of almost perpetual winter, the Great Sea Eagle reigns, a mighty chieftain, without a competitor, and with power unrivalled: finding ample subsistence in the arctic quadrupeds, and in the fishes of the northern seas, or occasionally levying tribute from the hosts of feathered travellers that make their annual pilgrimage to the places of their nativity, and intrude on his domain. Even the famous Condor of the Andes, the largest of Vultures, scarcely exceeds him in size, and in swiftness of flight, and power of beak and talons, is much his inferior. Pallas, a celebrated Russian naturalist, was the first who gave a satisfactory and reliable account of this Eagle, in his Zoology of Asiatic Russia, I. p. 343, (published at St. Petersburg in 1811, though printed many years previously,) but it appears to have been previously noticed by the distinguished navigators, Steller and Billings.