THE BAT.
Though all beings are equally perfect in themselves, as coming from the hands of the Creator, yet, in their relation to man, some appear more accomplished, and others more imperfect or deformed. The former are those whose figures are agreeable to us, and which we esteem complete, because all their parts are well connected, their members proportioned, and their functions easy and natural. The latter are those whose qualities are offensive to us, whose nature deviates from other beings, and whose forms differ from those whence we drew our first sensations, and those ideas which serve to model our judgments. The head of a man upon the neck of a horse, its body covered with feathers, and terminated with the tail of a fish, is a picture of enormous deformity, only because it is an assemblage of the most incongruous diversities of nature. An animal, like the bat, which is half quadruped and half bird, and which, in fact, is neither the one nor the other, is a kind of monster, because it unites the attributes of two such different genera, and resembles none of those models presented to us in the grand classes of Nature. It is an imperfect quadruped, and a still more imperfect bird; as a quadruped it should have four feet, and as a bird it should have feathers and wings. In the bat the fore feet are, properly, neither feet nor wings, though the animal uses them for the purpose of flying and dragging himself along the ground; they are two shapeless extremities, of which the bones are of an enormous length, and connected by a membrane neither covered with feathers nor hair like the rest of the body; they are a kind of small wings or winged paws, in which we only see one claw about an inch in length, and with which the other four, though very long, must act in conjunction, as they have no peculiar movements, no separate functions; they are a kind of hands ten times larger than the feet, and four times longer than the whole body of the animal; in a word, they are parts which have rather the appearance of caprice and accident, than a regular production. This membrane covers the arms, forms the wings, or hands, of the animal, is united to the skin of the body, and, at the same time envelopes not only its legs, but even its tail, which by this whimsical junction becomes, as it were, one of its toes. To these incongruities, these disproportions of the body and members, may be added the still more striking deformities of the head. In some species the nose is hardly visible; the eyes are sunk near the tip of the ear, and confounded with the cheeks; in others the ears are as long as the body, or else the face twisted into the form of a horse-shoe, and the nose covered with a kind of crust. Many of these animals have four substances from their heads, resembling ears, and of all of them the eyes are small, obscure, and covered; their noses are ill-formed, and their mouths extend from ear to ear; they shun society and the light, inhabit dark places, which they quit only for nocturnal excursions, return before the break of day, and in a manner glue themselves against the walls. Their motion in the air is less a flight than an uncertain flutter, which they execute by struggles and in a very awkward manner; they raise themselves from the ground with difficulty, and never soar to a great height; their flight being far from either rapid or direct, but is performed by hasty vibrations in an oblique and winding direction; in their flight they, however, seize gnats, moths, and other nocturnal insects. These they swallow entire, and in their excrements we meet with the remains of wings and other dry parts which they were unable to digest.
Having one day descended into the grottoes of Arcy to examine the stalectites, I was surprised to find, upon a spot covered with alabaster, and in a place so gloomy, a kind of earth so very different; it consisted of blackish matter several feet in width and breadth, and composed almost entirely of wings and legs of insects, as if immense numbers had collected there and perished together. This heap, however, was nothing more than the dung of bats, amassed, probably, from their having made that their favourite residence for many years; for in the whole extent of the grottoes, which is more than the eighth of a league, I saw no other similar mass; I therefore concluded that they had fixed upon this spot, because a small gloomy light reached it from the top, and that they had not proceeded further, lest they should have been too much enveloped in obscurity.
Bats have nothing in common with birds, except the faculty of flying, and therefore must be classed among quadrupeds; but as the ability to fly implies a great degree of force in the superior and anterior parts of the body, the pectoral muscles of the bat are more strong and fleshy than those of any other quadruped, a circumstance in which they have some resemblance to birds; in every other respect their conformation both external and internal is different. The lungs, heart, organs of generation, and all other viscera, except the prominent sexual distinction, which is similar to that of a man or a monkey, are the same as in other quadrupeds; like them also they are viviparous, and have teeth and nipples. It has been affirmed that they bring forth only two at a time, that they suckle their young, and even carry them when they fly. It is in summer they couple and bring forth, for during winter they are in a state of torpor; some cover themselves with their wings as with a cloak, and suspend themselves by their hind legs in subterraneous caverns; others cling to walls, or conceal themselves in holes. When they retire they do it in numbers, and collect together to defend each other from the cold; and they pass the whole winter, from the end of autumn to the spring, without either food or motion. They can support hunger better than cold; and though they can subsist many days without food, they are nevertheless carnivorous; for when opportunity serves, they will devour meat of all kinds, whether raw or roasted, fresh or corrupted.
There were but two species of bats described as natives of our climate, until M. Daubenton discovered five others equally common and abundant, which renders it astonishing they should have remained so long unnoticed. The whole of them are widely different, and never dwell together. The first is the common bat, ([fig. 86.]) which we have already described. The next is the long-eared, ([fig. 84.]) which is perhaps more numerous than the common bat; its body is more diminutive, its wings are shorter, its snout smaller and more pointed, and its ears large beyond all proportion. The third species, which I call the noctule, from the Italian word noctula, was not known, though very common in France, and more frequently met with than the two preceding. It is found under the roofs of houses, castles, and churches, and in hollow trees; it is almost as large as the common bat, its ears are broad and short, its hair of a reddish cast, and its voice sharp and piercing. The fourth is distinguished, by the name of the serotine; it is smaller than the common bat or the noctule, and nearly the size of the long-eared; its ears, however, are sharp, and pointed, its wings are black, and its body of a deep brown. The fifth I call the pipistrelles, ([fig. 85.]) from the Italian word pipistrello, which signifies also a bat. Of all the bats this is the smallest and least ugly, though the upper lip is swelled, its eyes small and hollow, and its forehead covered with hair. The sixth is named the barbastelle ([fig. 89.]) from barbestello another Italian word, signifying a bat. This is nearly of the same size as the long-eared; its ears are as broad but not so long. The name barbastelle is the more applicable to it, as it seems to have whiskers, which nevertheless are only protuberances over the lips; its snout is short, nose flat, and its eyes close to its ears. The seventh, and last, is distinguished as the horse-shoe bat, ([fig. 88.]). The face of this animal is singularly deformed, of which the most apparent feature is a membrane in the form of an horse-shoe round the nose and upper lip; this species is very common in France, among the walls and in the vaults of old ruinous castles, and of which there are large and small, but in form, and in every other particular, they are similar. As I have not met with any of the intermediate sizes, I cannot determine whether this difference is produced by age, or a permanent variety in the same species.
THE LOIR.
Of the loir, or great dormouse, or as some naturalists have termed it, the fat squirrel, there are three species; and, like the marmot, they all sleep during the winter; namely, the loir, the lerot, and the muscardin, or common dormouse. These three species have been confounded together although they are very different, and easily distinguished. The loir is nearly of the size of the squirrel, and like that animal, has its tail covered with long hair; the lerot is not so large as a rat, has very short hair on its tail, except at the extremity, where there is a tuft of long hair; the dormouse is not bigger than the common mouse, its tail is covered with longer hair than the lerot’s, but shorter than the loir’s, and it also has a tuft at the extremity. The loir differs from the other two, by having black spots about its eyes, and the dormouse by having white hair upon his back. They are all white or whitish under the neck and belly; the white of the lerot is beautiful, that of the loir more dark, and that of the dormouse has a yellow line in all the inferior parts.
Engraved for Barr’s Buffon.