This difference in the time of gestation between the she-wolf, who goes above a hundred days, and the bitch that does not exceed 60, proves that the wolf and dog differ not more in their dispositions than in their temperament, particularly in one of the chief functions of the animal economy; besides the wolf lives longer than the dog, and the she-wolf breeds but once in the year, while the bitch has two or three litters in the same period; for these, together with the reasons we have adduced in the history of the dog, the wolf and the dog cannot be considered as the same animal; but by the nomenclators of Natural History, who have only a superficial knowledge of Nature. The wolf also differs from the dog in several external characteristics. The aspect of the head and form of the bones are not the same, the cavity of the eye is obliquely placed in the wolf, the orbits are inclined, his eyes sparkle in the night, he howls instead of barking, his step is more precipitate, yet more uniform, his body is stronger but less supple, his limbs more firm, his jaws and teeth larger, and his hair much coarser. When the females are near the time of bringing forth, they seek for an agreeable place in the inmost recesses of the forest; in the middle of the chosen spot, they level a small space, cutting away the thorns and briars with their teeth; they can carry thither a quantity of moss, which they form into a bed for their young; they generally bring forth five or six, sometimes eight or nine, but never less than three. The cubs, like puppies, come into the world with their eyes closed; the mother suckles them for some weeks, and soon learns them to eat flesh, which she prepares for them by chewing it; some time after she brings them field mice, leverets, partridges, and birds yet alive; the young wolves begin by playing with, and end by killing them, when the dam strips them of their feathers, skins them, tears them in pieces, and gives to each of her young a share. They do not leave this den until they are six weeks or two months old; they then follow the mother, who leads them to drink in the trunk of some old tree, or to a neighbouring pool. If she apprehends any danger, she hastily conducts them back, or conceals them in some convenient place. Though at other times more timorous than the male, yet when her young are attacked she becomes fearless, and defends them with fury. She never forsakes them until they have shed their first teeth, and completed their new; when, having acquired talents for rapine, and learned industry and courage from her example, she leaves them to shift for themselves, being herself about to be engaged in the care of a new progeny.