One of the most curious members of the duck family is the large Loggerheaded Duck or goose (_Anas brachyptera_) of the Falkland Islands, which sometimes weighs twenty-two pounds. It was formerly called, from its extraordinary manner of paddling and splashing upon the water, race-horse, but is now named, much more appropriately, steamer. Its wings are too small and weak to allow of flight, but by their aid, partly swimming and partly flapping the surface of the water, it moves very quickly. The manner is something like that by which the common house duck escapes when pursued by a dog; but Mr. Darwin, who often watched the bird, is nearly sure that the steamer moves its wings alternately, instead of both together, as in other birds. These clumsy logger-headed ducks make such a noise and splashing, that the effect is exceedingly curious. It is able to dive only a very short distance. It feeds entirely on shell-fish from the kelp and tidal rocks; and hence its beak and head, which it uses for the purpose of breaking them, are so surprisingly heavy and strong, that they can scarcely be fractured with a hammer. Another remarkable inhabitant of the southern hemisphere is the Rock Goose, (_Anas antarctica_,) which exclusively inhabits rocky shores, and is often met with on the Falkland Islands, and on the west coast of America, as far north as Chili. In the deep and retired channels of Tierra del Fuego, the snow-white gander, invariably accompanied by his darker consort, and standing close by each other on some distant rocky point, is a common feature in the landscape. [Illustration: Red-Breasted Merganser.] The Mergansers differ chiefly from the sea-ducks, whom they otherwise closely resemble both in outward form and mode of life, by their comparatively long and slender bill, furnished with serrated edges and hooked at the extremity. All the British species are adorned with crests, or a tuft of long feathers, at the back of the head. The red-breasted merganser is a beautiful bird, painted with a variety of gay colours. "The head and throat are of a rich shining green, the neck white, except a narrow dark line behind; at either side before the wings are numerous large white feathers bordered by velvet-black; the lower part of the neck and breast is chestnut-brown, varied with dark streaks, and the body and wings are elegantly diversified with white, black, and brown feathers." (Harvey, _Sea Side Book_.)