Part 10

Several of the naturalists who have recently visited California have informed us that they saw occasionally large species of Eagles, or other large rapacious birds, of which they did not succeed in procuring specimens, nor in approaching within sufficiently short distance to be enabled to examine them satisfactorily.

We have introduced the extraordinary bird which is the subject of our present article, thus early into our work, for the purpose mainly of asking attention to a most remarkable and interesting species heretofore apparently entirely unknown to American Ornithological writers, and also on account of its similarity, in some respects, to one of the most important of Audubon’s discoveries, the Washington Eagle. This celebrated author was not acquainted with the bird now before us.

The specimen of the Washington Eagle, described and figured by Audubon, does not appear to have been preserved, or at any rate is not known to be extant, nor does it appear that he ever procured more than one. His drawing, however, with some others of species which he had met with but once, appears fortunately to have escaped the destruction of his collection of pictures of birds by rats, as described in his Ornithological Biography, Vol. I. Introductory Address, p. 13, (Edinburg edition, 1831.)

We have no doubt that such a species exists, or in other words, that Audubon is entirely correct in regarding his bird as a peculiar species; and we think it quite impossible for his description and history to apply to the young of the common White-headed or Bald Eagle, as has been supposed by some American, and by nearly all late European Ornithologists. But we are disposed, at present, to question the correctness of his plate, and also his statement that the bird represented was an “adult male” (Orn. Biog. I. p. 62). We are aware, of course, that the plate may not be a fair representation of the drawing, and in fact it has not been very carefully engraved. The tail appears to be unfinished. Having, however, quite sufficient knowledge of the difficulties in getting up correct plates of birds, we are enabled fully to appreciate the disadvantages under which this distinguished Ornithologist, with all his artistic knowledge and perseverance, must necessarily have laboured at the commencement of his great work, and his plate of the Washington Eagle is one of the earliest, being the eleventh of the series.

The bill, as represented in the plate, is shorter than we have ever seen in any adult Eagle of this group (the fishing Eagles), and above all the arrangement of the scales on the tarsi anteriorly, is such as we have never observed in any rapacious bird whatever.

Notices of the Washington Eagle having been captured, have appeared occasionally (as in Nuttal’s Manuel, I. p. 71, and the Boston Journal of Nat. Hist. III. p. 72), and we have seen numerous specimens of Eagles of a size so large that they could not, without much doubt, be referred to the common white-headed species. But we have never seen nor heard of a specimen which presented all the peculiar characters represented in Audubon’s plate, and especially the anterior scales of the tarsus continued transversely so far down to the toes. The pointed and slender feathers of the neck, the large size, and in one specimen of a young bird, the short bill we have seen, and there are specimens now in the collection of the Philadelphia Academy in which these characters will be found, but not the peculiar arrangement of the scales of the tarsus. All other species of fishing Eagles have the head more or less marked with white in their mature plumage. In Audubon’s plate of the Washington Eagle, the head is of the same deep brown as the other parts. From analogy, therefore, it may safely be presumed that he was mistaken in supposing his specimen to be that of an adult male bird.

An interesting feature in the large specimens to which we allude, is the fact that they almost invariably have the ends of their tails broken as though injured by alighting habitually on rocks, or on the ground, thus apparently confirming Audubon’s statements. Young birds are however peculiarly liable to such injury on account of their feathers not possessing the strength and rigidity of more mature plumage.

Respecting the Washington Eagle, our conclusion is, therefore, after many years of attention to American birds, and especially to obscure or little known species, that of the existence of such a species in North America as is described by Audubon, in Ornithological Biography, I. p. 58, there can be no reasonable doubt. But we are of opinion that when adult it is very probably a bird with the head more or less white, and tail of the same colour; and we are disposed to regard the plate in Birds of America as erroneous, for reasons above intimated, or for others not at present demonstrable, and at all events as representing a young specimen. Waiving the presence of the character of the scales of the tarsi as above stated, we think that we have several times seen the young of the Washington Eagle, and that specimens of it are now in the collection of the Philadelphia Academy. It is not, however, so large as the immense Eagle which in the present article, and accompanying plate, we have the pleasure of presenting to the American public for the first time, but it appears to us to be more nearly related to it than to any other species.

The Eagle mentioned in the History of the Expedition of Lewis and Clarke, as cited in a preceding page, we are inclined to suspect to be the present species, but should not be surprised if it should be ascertained by succeeding naturalists to be the adult of the Washington Eagle.

The great Eagle now before us has never been observed as yet by an American voyager, and few specimens only are contained in European museums. The only specimen in the United States is that in the collection of the Philadelphia Academy from which the drawing was made for the present plate.

We have added as a suitable conclusion of our present article a translation of the original account of this Eagle as given by Pallas, and which will be found in his Zoology of Asiatic Russia, as cited above:

“Steller, worthy of a better fate, first observed this remarkable species, and in his manuscripts briefly described it. Now, also, I have before me an elegantly prepared specimen from my friend Billings, who, with the last navigator, explored the ocean between Kamschatka and America. This very large bird is frequent in the islands between Kamschatka and the American continent, especially in the islands noted for the unfortunate shipwreck and death of Bering. It appears very rarely in Kamschatka itself. In the highest rocks overhanging the sea, it constructs a nest of two ells in diameter, composed of twigs of fruit and other trees, gathered from a great distance, and strewed with grass in the centre, in which are one or two eggs, in form, magnitude and whiteness, very like those of a Swan. The young is hatched in the beginning of June, and has an entirely white woolly covering. While Steller was cautiously viewing such a nest from a precipice, the parents darted with such unforeseen impetuosity as nearly to throw him headlong; the female having been wounded, both flew away, nor did they return to the nest which was watched for two days. But, as if lamenting, they often sat on an opposite rock. It is a kind of bird, bold, very cunning, circumspect, observant, and of savage disposition. Steller saw a Fox (Vulpes lagopodus) carried off by one and dashed upon the rocks, and afterwards torn in pieces. It lives also on dead substances cast up by the sea, and various offscourings of the ocean.”

DESCRIPTION AND TECHNICAL OBSERVATIONS.

Genus Haliaëtus. Savigny, Description of Egypt, Zoology, p. 85, (1809.)

Size, large. Bill, strong, straight at the base, hooked and very sharp at the point, sides of the bill compressed, margin of upper mandible, slightly festooned. Wings rather long and pointed, formed for rapid and vigorous flight; tail moderate. Tarsi short, very strong, and with the toes, covered with scales; claws very strong, curved and sharp. About ten or twelve species known, which are scattered throughout the surface of the globe.

Haliaëtus pelagicus. (Pallas.) Aquila pelagica. Pallas, Zoographia Rosso-Asiatica, I. p. 343, (St. Petersburg, 1811, Quarto.) “Aquila marina. Steller, MSS.” Pallas ut supra. Falco Imperator. Kittlitz, Kupfertafeln zur naturg. der Vogel pt. I. p. 3, pl. 2, (Frankfurt, 1832.) Falco leucopterus. Temminck. Pl. col. I. pl. 489. Haliaëtus pelagicus. (Pallas.) Temm. & Schl. Fauna Japonica, Aves p. 10, pl. 4. Haliaëtus imperator. (Kittlitz.) Bruch in Isis XXV. p. 1102, (1832.)

Form. Very large and powerful, tail rather short, wedge shaped, the middle feathers being nearly four inches longer than the outer, which are shortest, all of the fourteen feathers somewhat pointed, but the central four lanceolate.

Bill strong, much compressed, very wide laterally or in altitude; upper mandible with a slight festoon; gape rather wide, extending so far back as to be immediately under the eye; cere large, in which at the distance of nearly an inch from the frontal feathers, the nostrils are obliquely inserted, large loral space bare, or with a few scattered bristles.

Wings rather short, third and fourth quills longest, but with the fifth little shorter; secondaries abruptly acuminated, and some of them with their shafts produced into filaments or thread-like appendages, exserted from the tips of the feathers; secondaries and greater coverts very broad and strong.

Legs and feet rather short, but strong; tarsus feathered below the joint for half its length, bare lower portion, with about five large frontal scales immediately succeeding the feathers; then to the toes in common with its entire posterior part, covered with numerous scales, which are rounded or hexagonal: the latter shape most readily observed behind; toes, with broad frontal scales; claws large.

Feathers of the head and neck, narrow and pointed, or acuminated; those on the breast and back, somewhat lanceolate, but broad, and sometimes abruptly pointed. Tail coverts, both above and below, ample—extending to half the length of the tail.

Dimensions of a skin from Behrings Straits. Total length from tip of bill to end of tail, about 3 feet 8 inches; wing, 2 feet 2 inches; tail, 1 foot 4 inches; bill, from tip of upper mandible to angle of the mouth, 3¾ inches; width of bill, laterally, at point of insertion of the nostrils, full 1¾ inches.

Colours. Female, nearly adult? Tail, white, the two external feathers having their outer webs, brownish black, mottled with white, and other feathers slightly spotted with the same brownish black. Entire other parts, above and below, very dark brownish black; lighter on the head and neck, and on which parts every feather is lighter in the middle.

Primary quills, shining black; secondaries and tertiaries, white at their bases, and brownish black at their ends; greater coverts narrowly tipped with brownish white; lesser coverts whitish on both margins, especially at their bases, terminated with brownish. Rump with the plumage white at the base.

Bill, yellow, (in skin,) feet, yellow.

Adult, as described by authors cited above. Large frontal space, commencing at the base of bill, white, which is also the colour of the greater wing coverts, the abdomen, and the tail. All other parts of the plumage blackish brown; bill, cere, legs and feet, yellow.

Hab. Russian possessions in Asia and America. Spec. in Mus. Acad. Philada.

Obs. The largest of all known Eagles, and nearly related to H. Washingtonii (Aud.). It differs from the latter, as described by Audubon, in being larger generally, but has the wing shorter and the tail wedge shaped, and containing fourteen feathers. We suppose H. Washingtonii to be the young of a closely allied species, and that both are strictly congeneric with H. leucocephalus, H. albicilla, H. vocifer, and others known as Fishing Eagles.