Notwithstanding its large size, the albatross does not appear to be a quarrelsome bird; and when attacked by its enemy the skua gull, it endeavours to save itself by flight. Captain Cook once saw a contest between two of these gulls and an albatross; the sole object of the latter appeared to be to defend its breast and the softer portions of its body from the fierce assaults of its antagonists: loss of liberty, however, is said to irritate the bird greatly. Its voice, according to Sonini, resembles that of the pelican, with a cry approaching the bray of an ass. This author further observes with regard to the flight of the albatross:--'The manner of these birds' flying is very astonishing; the beating of their wings is perceived only at the moment of taking wing, and often they make use at the same time of their feet, which, being webbed, enable them to rise by striking the water. This impulse once given, they have no longer need to beat their wings; they keep them widely extended, and seek their prey, balancing themselves alternately from right to left, skimming with rapid flight the surface of the sea. This balancing serves doubtless to accelerate their course, but it would seem scarcely sufficient to support them in the air. Perhaps an imperceptible fluttering; of their feathers is the principal cause of this extraordinary movement. In this respect they would require to have muscles especially adapted, and for this reason I consider that the anatomy of these birds merits the greatest attention.' By the Germans the albatross is named 'der wandernde schiffsvogel' (the wandering ship-bird); the Dutch term it 'Jean de Jenten;' English sailors, looking to its bulky appearance, call it 'the Cape sheep;' and with them also the sooty albatross is 'the Quaker-bird.' There are seven species particularised by naturalists: the technical description, however, of the _Diomedea exulans_, given by Mr Gould, will apply in general terms to the whole. 'The wandering albatross,' he observes, 'varies much in colour at different ages: very old birds are entirely white, with the exception of the pinions, which are black; and they are to be met with in every stage, from pure white, white freckled, and barred with dark-brown, to dark chocolate-brown approaching to black, the latter colouring being always accompanied by a white face, which in some specimens is washed with buff; beneath the true feathers they are abundantly supplied with a fine white down; the bill is delicate pinky-white, inclining to yellow at the tip; irides very dark-brown; eyelash bare, fleshy, and of a pale-green; legs, feet, and webs, pinky-white. The young are at first clothed in a pure white down, which gives place to the dark-brown colouring.' The 'cautious albatross,' as its name indicates, is very shy, seldom approaches the land, and is not easily captured: the yellow-billed species, when in pursuit of its prey, will dive and swim for several yards under water.