ALSO resembles the diminutive Petrels in some respects; but instead of being a pigmy it is a giant among birds. Its wings often measure as much as fifteen feet in extent and are of corresponding power, as they have to support the Albatross by the day together above the stormy waves of the great Southern Ocean. Indeed, so enormous is their strength and endurance, that they have been known to follow ships for whole days together, without once resting upon the water. From time to time the gigantic bird plunges down into the sea to capture the fishes with which he satisfies his hunger; and it is said that where Albatrosses are numerous they will even attack sailors who may happen to fall overboard. From their abundance at the Cape of Good Hope they are often called by mariners Cape sheep. Albatrosses generally weigh from twenty to thirty pounds. The plumage is white, except some narrow bars upon the back, and some of the long wing feathers, which are black, and of the head, which is a reddish grey. The beak is long and powerful, and curved at the end, and would be a most terrible weapon if the owner were of a pugnacious disposition. It is, however, quite inoffensive, and is even sometimes attacked by much smaller birds, when it invariably takes to flight, and the immense power of its wings generally enables it to distance its pursuers. The Albatross, like most sea birds, has a most insatiable appetite, and devours immense quantities, not only of fish, but of other sea-animals,--such as molluscs. They are so greedy that they are caught by a line baited with a piece of flesh, which the ever-hungry bird swallows at a gulp, paying with his life for the dear repast. They are taken by the natives of the countries they frequent, not for their flesh, which is tough and insipid, but for the sake of their entrails, which are very large and elastic, and are used for a number of useful purposes. [Illustration: THE GREAT NORTHERN DIVER. (_Colymbus glacialis._)] THE GREAT NORTHERN DIVER is found most abundantly in the Arctic seas, but a considerable number of them dwell on the shores of Scotland. It has a rather long, strong, and sharply pointed bill; its back and wings are black, ornamented with numerous white spots; its lower surface is greyish-white; and its head and neck are black, with a couple of white collars across the front of the neck. The Great Northern Diver is a large bird, measuring nearly three feet in length; its wings are small in proportion to its size, but yet the bird is able to fly very rapidly. It is, however, in the water that it is most active; it swims and dives with the most remarkable ease, and even under water goes as fast as a four-oared boat. Its food consists of fishes, and it breeds amongst the herbage of the sea-shore, the female laying two or three eggs in a neat nest made of grass. [Illustration: THE PUFFIN, (_Fratercula arctica_,)]