HALIAETUS PELAGICUS.—(Pallas.)
The Northern Sea Eagle.
PLATE VI—Female.
The study of the rapacious birds of western and north western America presents great attractions to the ornithologist, and a wide field for discovery.
Owing, principally, to the difficulties in obtaining, or even in observing the shy and vigilant birds of this family, their investigation is of peculiar character, and dependent on accidental opportunity in some measure every where, but especially in countries where the primitive forests yet flourish in undisturbed vigour, and which abound in unexplored and, as yet, inaccessible mountains; or in plains of an extent only known to the adventurous hunter, and traversed only by the wandering Indian, or by the pioneers of civilization: the devoted missionary, or the enterprising and hardy emigrant. Such is the character of the regions of that portion of North America, the visits of naturalists to which have been too transient to afford proper opportunities for the study of the rapacious birds, and the detached items of information which have appeared from time to time are not sufficiently numerous to be regarded as giving any clear insight into their history.
The naturalist, generally travelling expeditiously with a military or other party on business for the government, or with a caravan of emigrants, may get a glimpse of a Falcon of singularly novel and beautiful plumage as it darts away into concealment; or may see, occasionally, an Eagle seated at ease, and viewing the novel cavalcade leisurely, but beyond the range of his rifle; or as he performs, in turn, his assigned duty, and guards his sleeping companions in the encampment, his watch-fire may attract clamorous night birds of strange forms whose cries are unfamiliar to him, but to his practised ear may present unmistakable family relationship, yet it is readily demonstrable that the proper study of those birds requires facilities of a description only attainable in the course of more protracted residence and frequently recurring opportunities.
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.
Before the time of Pallas, and, it may be added, since, also, various reports of remarkable and sometimes very large Eagles having been seen in different parts of America, were from time to time made by travellers and voyagers. In fact, some are carefully and credibly described which are yet unknown to naturalists. Capt. Cook, in the account of his last voyage, or rather in that part of it which was written by himself, states that several Eagles, one of which is very remarkable, were seen at Kayes’ Island, on the northwest coast of America, in latitude 59° 49′ N. “We saw,” he says, “flying about the woods, a Crow, two or three of the white-headed Eagles, mentioned at Nootka, and another sort full as large, which appeared also of the same colour, or blacker, and had only a white breast.” Last Voyage, II. p. 352, quarto, London, 1784. It is necessary for me to say only, that no species of Eagle having a white breast is yet known as an inhabitant of any part of America.