This species, the Rotche of Arctic navigators, and the _Mergulus alle_ of ornithology, is but an irregular visitor to British seas during autumn and winter, and as it seldom comes near the land under ordinary circumstances, is not a very familiar bird to the seaside observer. Exceptionally severe weather not unfrequently drives this little bird far inland. In its general colouration the Little Auk closely resembles the Razorbill, but it is less than half the size, and has a considerable amount of white on the wings. This curious little species congregates in incredible numbers at certain spots in the Arctic regions, to breed. Beechey, at the beginning of the present century, records that he has seen nearly four millions of these birds on the wing at one time. Colonies of the Little Auk are known in Nova Zembla, Franz-Josef Land (?), Spitzbergen, Grimsey Island (to the north of Iceland), and the coasts of Greenland. Like all its larger allies, the Little Auk is thoroughly pelagic in its habits, apparently only visiting the land to breed, living on the sea for the remainder of the year. It is well adapted for its lengthened sojourn upon the waters. It swims well and buoyantly, sitting rather low, flies rapidly when inclined, dives with as much ease as a fish, and sleeps quite safely and comfortably upon the waves. Voyagers in the Arctic regions have met with flocks of Little Auks at most times of the year, often far from land, and occasionally crowding upon the masses of floating ice. All observers agree in describing it as a somewhat noisy bird, and its specific name of _alle_ is said to resemble its ordinary note. There is scarcely a winter that the Little Auk is not obtained in varying numbers off the British coasts, more frequently, of course, in the northern districts, but under ordinary circumstances it keeps too far off the land to be observed, and occurs most plentifully during periods of continued storm. Where the uncounted millions of Little Auks winter, that are known to breed in the Arctic regions, washed by the Atlantic, is still an unsolved problem. The few that are observed are as nothing in comparison with the numbers that crowd at certain spots during summer. Perhaps it is because the area of distribution is so wide in winter, and, comparatively speaking, so restricted during summer. The food of the Little Auk consists largely of minute crustaceans, and possibly of small fish. The bird is said to resort to the vicinity of fishing fleets, to pick up the refuse thrown overboard.