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Page:Ornithological biography, or an account of the habits of the birds of the United States of America, volume 1.djvu/197

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nomination, as its head is as densely feathered as that of any other species, although its whiteness may have suggested the idea of its being bare.

Falco leucocephalus, Linn. Syst. Nat. vol. i p. 124.-Lath. Ind. Ornith. vol. i. p. 11.

Bald Eagle, Lath. Synops. vol. i. p. 29.—Wilson, Americ. Ornith. vol. iv. p. 89. Pl. 36. Adult.

Sea Eagle, Falco Ossifragus, Wils. Amer. Ornith. vol. vii. p. 16. Pl. 55. fig. 2. Young.

Adult Male. Plate XXXI.

Bill shortish, very deep, compressed; upper mandible with the dorsal outline at first straight, curved towards the tip, rounded above, sloping and flattish on the sides, nearly straight, with an obtuse process, in the acute, overlapping edges; the tip deflected, trigonal, acute, at its lower part nearly perpendicular to the gap line; lower mandible slightly convex in its dorsal outline, with inflected acute edges, which are arched toward the end, the tip broadly rounded. A naked cere, in the fore part of which are the oblong, oblique, nearly dorsal, open nostrils, which have a process from the anterior margin. Head rather large, flat above. Neck robust, rather short. Body ovate. Feet with the leg long, the tarsus short, feathered in its upper third, rounded, anteriorly covered with transverse scutella, posteriorly with large, laterally with small tuberculous scales; toes robust, free, scutellate above, papillar and scabrous beneath, width large tubercles; claws curved, rounded, marginate beneath, very acute.

Plumage compact, imbricated, glossy; feathers of the head, neck and breast, narrow and pointed; of the back and breast acute, of the other parts broad and rounded. Space between the bill and eye barish, being sparsely covered with bristly feathers. Eyebrow bare and projecting. Wings long, second quill longest, first considerably shorter. Tail of ordinary length, much rounded, extending considerably beyond the tips of the wings; of twelve, broad, rounded feathers.

Bill, cere, edge of eyebrow, iris, and feet, yellow; claws bluish-black. The general colour of the plumage is deep chocolate, the head, neck, tail, abdomen, and upper and under tail-coverts, white.

Length 34 inches, extent of wings 7 feet; bill along the back 2¾ inches, along the under mandible 2¾, in depth 15/12; tarsus 3, middle toe 3½.