Captain Fitzroy describes, at Noir Island, multitudes of Penguins swarming among the bushes and tussac-grass near the shore, for moulting and rearing their young. They were very valiant in self-defence, and ran open-mouthed by dozens at any one who invaded their territory. The manner of feeding their young is amusing. The old bird gets on a little eminence and makes a loud noise, between quacking and braying, holding its head up as if haranguing the Penguinnery, the young one standing close to it, but a little lower. The old bird then puts down its head, and opens its mouth widely, into which the young one thrusts its head, and then appears to suck from the throat of its mother; after which the clatter is repeated, and the young one is again fed: this continues for about ten minutes. Mr. Darwin, having placed himself between a Penguin, on the Falkland Islands, and the water, was much amused by watching its habits. "It was a brown bird," says Mr. Darwin, "and, till reaching the sea, it regularly fought and drove me backwards. Nothing less than heavy blows would have stopped him: every inch gained, he firmly kept standing close before me, erect and determined. When thus opposed, he continually rolled his head from side to side in a very odd manner. While at sea, and undisturbed, this bird's note is very deep and solemn, and is often heard in the night time. In diving, its little plumeless wings are used as fins, but on the land as front legs. When crawling (it may be said on four legs) through the tussacks, or on the side of a grassy cliff, it moved so very quickly that it might readily have been mistaken for a quadruped. When at sea, and fishing, it comes to the surface for the purpose of breathing with such a spring, and dives again so instantaneously, that I defy any one, at first sight, to be sure that it is not a fish leaping for sport." Bougainville endeavoured to bring home a Penguin alive. It became so tame that it followed the person who fed it; it ate bread, flesh, or fish; but it fell away and died. The four-footed Duck of Gesner might have owed its origin to an ill-preserved Penguin. The notion of its being four-footed might have been fortified by some voyager who had seen the bird making progress as Mr. Darwin has above described.