We must not omit to mention that the eagerness of these birds for brooding is so great, that, when robbed of their eggs, they have frequently been known to steal the eggs or even the young of others of their species. In its natural state the Eider Duck subsists upon small fish, molluscs, crustaceans, and fish spawn, but when kept confined will eat grain. The flight of this species, which is steady and rapid, is usually carried on near the surface of the water; it dives with facility, and is capable of remaining submerged for a considerable time.
THE KING EIDER.
The KING EIDER (Somateria spectabilis) has the bill, the sides of which are elevated, arched and ridged, surrounded by a fine black band; a similar band runs from the base of the under mandible down each side of the neck. The upper head is grey, the cheeks are sea-green, the neck, back, and sides of the rump white, the front of the breast is light flesh-red; the scapulars, lower part of back, wings, tail, and belly, are white, and the rest of the feathers black; tertials, as in the preceding species, deflected. The eye is brown, beak red, and foot reddish. The female is distinguishable from that of the True Eider by her light reddish brown plumage, and by the structure of the base of the bill.
General Sabine states (in the Appendix to Sir E. Parry's first Voyage) that these birds were abundant in the North Georgian Islands, their nests being placed on the ground in the neighbourhood of fresh-water ponds, and their food consisting of the aquatic vegetation. Sir J. C. Ross says, "Vast numbers of this beautiful Duck resort annually to the shores and islands of the Arctic Regions in the breeding season, and have on many occasions afforded a valuable and salutary supply of fresh provision to the crews of the vessels employed on those seas. On our late voyages comparatively few were obtained, although seen in very great numbers. They do not retire far to the south in the winter, but assemble in large flocks, the males by themselves, and the females with their young brood are often met with in the Atlantic Ocean, far distant from any land, where the numerous crustaceans and other marine animals afford them abundance of food."
This species, which very rarely occurs in Great Britain, was found, on one occasion, according to Dr. Latham, about June, at Papa Westra, one of the Orkney Islands. The eggs, six in number, rather smaller than those of the True Eider Duck, were embedded in down, and placed on a rock overhanging the sea. Nuttall states that the eggs of this bird are whitish, while Yarrell describes them as pale green, and Audubon as of a uniform dull greenish hue. Latham tells us that in Greenland, where the King Ducks are common, the natives assemble in canoes, and by their shouts terrify the birds, which dive to avoid them; but as the place where they are about to emerge is betrayed by the bubbling of the water, their pursuers follow them, and the same game being several times repeated, the birds are at length tired out and easily secured.
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The WESTERN or STELLER'S EIDER DUCK (Somateria or Heniconetta Stelleri) is a smaller species, still more beautifully coloured and marked. In the male the head, nape, and sides of neck are white, a spot on the forehead, and a transverse band at the back of the head are green, a circle round the eye, the fore and hinder neck, the rump, tail, and points of the quills are black. The upper wing-covers and shoulders are white, striped with dark blue. The under side, as far as the blackish brown centre of the belly, is yellowish brown. In the plumage of the female reddish brown predominates. The eye is brown, the beak grey, and the foot greenish grey. The Western Eider Duck was first described by Steller, from specimens which he obtained in Kamschatka, where it builds on inaccessible rocks. But few specimens of this rare Duck have been shot in England. This species is exclusively a sea bird, is never seen entering the estuaries of rivers, and breeds among rocks and precipices. It flies in large flocks.
The SCOTERS (Oidemia) are birds of considerable size, with remarkably dark plumage. Their beak is moderately long, broad, irregularly swollen at its junction with the forehead, and bright coloured. The tarsi are short, the toes long and large, and the wings of medium length; the tail, which is wedge-shaped, consists of fourteen feathers; the soft and velvety plumage only exhibits colour on the head and wings. All the species belonging to this group are inhabitants of high latitudes, and breed within the Arctic Circle.