The fourth large family of Swimming Birds includes the many long-winged species which are thus named not only because of the great length of their wings, but for their long and enduring power of flight. Mariners meet them everywhere, and easily recognize them by their long and pointed wings, forked tails and short legs. They pass their lives at a great distance from land, and do not approach the shore except to lay their eggs and hatch their young. In this family are found the Albatrosses, the Petrels, Gulls, Skuas, Scissors-bills or Skimmers, and the Sea Swallows. The Albatross is the largest and the most bulky of all the Birds which fly over the surface of the sea. It belongs principally to the southern hemisphere. The sailors know it under the name of Cape Sheep, which they give it on account of its enormous size. Its extended wings measure as much as sixteen feet five inches across. Its plumage is generally white, with the exception of a dark back. Courage is not measured by size. This rule holds good in these Birds, for notwithstanding their wonderful strength and their large, strong, sharp and hooked bills, they exhibit the most unaccountable cowardice. Even a poor weak Sea-mew will attack an Albatross, the cowardly giant finding no better means of getting rid of his enemy than by plunging into the water. Although they are most gluttonous in taste, they prefer flight to contending for their food. This consists of marine animals, Molluscs, and the spawn of Fish. When they are filled to repletion, and the prey which they have seized is too large to swallow whole, they may be seen with part of it hanging outside their bill, until the first half is digested. Thus embarrassed, the Albatross has only one mode of escape if it happens to be pursued; namely, by disgorging the food with which its stomach is overloaded. Gifted with an extraordinary power of flight, these Birds venture out to enormous distances from land, more especially in stormy weather. They seem to delight in storms. When overcome with fatigue, they repose on the surface of the sea, placing their head under their wings. When in this position they are very easily captured. In order to do this, the sailors have only to approach silently, and knock them down with a boat-hook or spear them with a harpoon. Navigators have opportunities of observing these Birds in the Antarctic regions, where there is no night at certain seasons of the year, and they assert that the same flocks may be seen hovering around their vessel during many successive days without exhibiting the least signs of exhaustion or the slightest relaxation in their strength. A peculiarity in their mode of flight is that, whenever they are ascending or descending, they seldom flap their wings, but fly without an effort.