This diminutive species, the _Procellaria pelagica_ of Linnæus and most modern writers, and the “Mother Carey’s Chicken” of mariners, is, perhaps, the best known of the Petrels that frequent the British seas. It is remarkable for being the smallest web-footed bird—a nearly black little creature, with a white patch on the upper tail coverts. Small as this Petrel is, it is just as oceanic in its haunts as its larger and more robust congeners. During boisterous weather, especially about the period of the equinoctial gales in autumn, Stormy Petrels are not unfrequently driven some distance inland; and examples of this species have been picked up more or less exhausted, even in the centre of busy towns. At this season it is also noticed a good deal about certain lighthouses at night. After rough nights I have seen odd Stormy Petrels flying over the fishermen’s cottages like swallows, and many of them are, or used to be, caught in the flight-nets in the Wash. The actions of this Petrel at sea are characteristic of its congeners. It flies about in the same fluttering manner, following the curves of the waves, and pattering along their sloping surfaces with its tiny-webbed feet. It may be met with hundreds of miles from land, following ships, or paying a vessel a short visit, then disappearing again, lost in the lonely wastes of water. It is able to weather many a storm at sea, doubtless obtaining much shelter in the deep hollows of the mighty waves. It may be seen flitting about the storm-stirred sea quite at its ease; and from this fact, it is very popularly believed to be a harbinger of bad weather, and disliked accordingly by sailors. Except during the breeding season, the Stormy Petrel rarely visits the land; it rests and sleeps upon the sea, swimming just as buoyantly as a Duck. It is seldom seen to alight, however, unless to pick up some morsel of food, and rarely remains long upon the water. At its breeding stations it is certainly very nocturnal in its habits, but otherwise it may be seen at all hours of the day fluttering above the sea. Its food probably consists almost entirely of cuttlefish; I have dissected many specimens of this Petrel, and never found anything but oil mixed with sorrel in the stomach. When taken in the hand the bird usually throws up a drop of this oil, or squirts a little from the nostrils, just as the larger Fork-tailed Petrel will do. I have never heard the Stormy Petrel utter a sound, except at the breeding stations, where its note is a noisy twitter. It is more or less gregarious at all times of the year, and generally roams the sea in small scattered parties, but its gatherings are most extensive at certain of its breeding stations.