By the Rev. J. G. WOOD, M.A.

The hedgehog, like the bat, is carnivorous.

Toward the end of autumn it looks out for some retired spot, a perfectly dry cavity in the ground or in the rock being the favorite resort. Here it gathers together a large quantity of dry moss, leaves, grass, etc., covers itself with them, rolls itself into a ball, and sinks into the hibernating lethargy.

It is rather remarkable that a hibernating animal is much more sensitive to a slight touch than to general handling. If, for example, a single hair of a hibernating bat or a single quill of a hibernating hedgehog be raised, the creature gives a quick start, and takes a few breaths before relapsing into lethargy. Yet a bat may be sunk under water, or have a thermometer tube passed into its stomach, without being awakened.

When a hibernating bat is sunk under water of the same temperature as that of its body, it does not even attempt to breathe. A similar experiment was tried with a hedgehog, and after it had been under water for twenty-one minutes, one tiny bubble of air rose to the surface. I need scarcely say that if the animal had been awake, it would have been drowned in less than a fourth of the time.

For the bat, no food can be found until the warm weather returns, and so the hibernation is unbroken for at least five months. But, though food be almost entirely withdrawn from the hedgehog, some nutriment remains, and therefore the animal is so constituted that it can discover and consume the food which has been provided for it.

This food chiefly consists of snails, which are themselves hibernators, and which during the winter months conceal themselves so effectually that they are seldom detected except by their two great wintry foes, the thrush and the hedgehog.

The hedgehog, not possessing so wide a range of hibernating temperature as the bat, which actually “hibernates” daily for a short time even during the hottest summers, is roused by an hour or two of warm sunshine such as we often experience about February. Awakened by the warmth, the hedgehog unrolls itself, creeps out of its refuge, and trundles (I know no better word to describe its peculiar pace) away in search of food. Taught by instinct, it is sure to come upon one of the strongholds of the snail, eats as many as it needs, returns to its home, and sleeps until awakened in a similar manner.

Then we have the vegetable-eating squirrel, which is a partial hibernator.

During the later weeks of autumn, the squirrel may be seen in the act of making provision for the winter. In the first place it collects a vast store of fallen leaves, moss, twigs, and similar materials, and with them constructs its winter nest.

Squirrels have two distinct kinds of nest, one for the winter and the other for the summer. Both nests are of considerable size, and both are so well concealed that to detect them is a very difficult task. The summer nest is comparatively light in texture, and is placed near the ends of lofty boughs, where it is hidden by the leaves. Moreover, its position renders it almost unassailable, as the branch on which it is built would not even endure the weight of a small boy. In the winter, when the leaves are off the trees, the nests are very conspicuous, and in the New Forest, where I gave some time to watching the habits of the squirrel, they are exceedingly numerous.

In fact, the squirrels of the New Forest swarm in such numbers, and do so much damage to the young twigs of the trees, that many hundreds must be shot annually, just as is the case with rabbits. They are always shot just before hibernating, because, as they put on new robes for the winter, their skins fetch the best prices. Moreover, the animals become fat, as is the case with all hibernators, and so their flesh is in good condition for the table. Squirrel-pie is a well-known luxury in some parts of England, and is far superior to rabbit-pie, as it is free from the peculiar flavor which attaches itself to the rabbit, and to many persons is exceedingly repulsive.

The winter nest is a very large one, containing at least four or five times as much material as would serve for a summer’s nest. Instead of being placed at the end of a bough, it is always set in the hollow caused by the junction of several large branches with the trunk. The exterior is so skilfully formed, that when the tree is viewed from below, even the most practised eyes will often fail to detect the nest, large as it is.

The amount of material which a squirrel employs in this nest is really wonderful. I have taken out of a single nest armful after armful of leaves, until quite a large mound was raised at the foot of the tree, and I should think that there was enough material to fill two large wheelbarrows, even if it were pressed down closely.

I may here mention that the nest of the squirrel is known in some parts of England by the name of “drey,” and in others by that of “cage.” The latter term is employed in the New Forest.

The house being ready, next comes the task of laying up a store of food. This consists chiefly of nuts, which the animal chooses with marvelous sagacity, or rather, instinct. No one ever yet found an unsound or worm-eaten nut in a squirrel’s store. The animal does not rely on a single storehouse, but hides its treasures here and there within easy range of its nest. Many nuts it buries, and owing to this habit, nut-trees are apt to spring up in unexpected places, for, if the weather should be exceptionally severe, the squirrel awakens but seldom from its winter sleep, and so does not need the store which it has hidden. Or, it may die or be killed after it has laid up its food, and so the buried nuts will take root and produce trees.

A remarkable instance of this fact occurred in the grounds of Walton Hall, belonging to the late Charles Waterton.

In former days there had been in the estate an old wooden mill. It had been disused for many years, and at last the only relic of it was the upper millstone which was left on the ground. The reader may be aware that the center of the upper stone is pierced with a tolerably large hole, through which the corn makes its way between the stones.

In the autumn of 1813, some nut-eating, hibernating animal, almost certainly a squirrel, had found this stone, and thought that the hole would make an admirable hiding-place for a nut. For some reason, the nut was never eaten, and consequently began to germinate. Mr. Waterton, who pervaded his grounds at all hours of day and night, detected the green shoot at once when it appeared in the spring of the following year. Foreseeing that the shoot, if it lived long enough to become a tree, would raise the stone from the ground, he had a fence put round it, and gave special orders for its preservation.

His prevision proved to be perfectly correct. In course of years, the little shoot became a large tree twenty-five feet in height, and bearing fine crops of fruit annually, and Mr. Edmund Waterton told me that in his boyhood he had often climbed it for the purpose of procuring nuts. After the stem was large enough to fill the orifice in which it had been planted it lifted the stone, and raised it some eight or nine inches above the ground.

As might be imagined, in the course of years the pressure of the stone destroyed the bark, and stopped the circulation of the sap, so that the tree died. In order to save it from being blown down, the trunk and branches were cut away some feet above the stone. On my last visit to Walton Hall, shortly before Mr. Waterton’s death, the stone was still suspended above the ground, and as a memorial of so remarkable a result of hibernation, I made a careful sketch of it, which was published by Messrs. Macmillan.

It is also noticeable as an example of the slow, silent, and almost irresistible power of vegetation. Even the soft and pulpy mushroom has been known to raise a flat, heavy paving-stone fairly off the ground. Had the mushrooms been allowed to grow, and the paving-stone laid on them, it would have crushed them under its weight. But the vital powers of growth are so tremendous, even when acting upon so feeble a medium, that they performed a feat which would have been thought impossible had it not been witnessed.

In some parts of South America, where the growth of vegetation is surprisingly rapid, there used to be, and may be still, a mode of inflicting capital punishment by the power of vegetation. We all know the sharply-pointed and bayonet-like leaves of certain aloes. The victim was simply fastened to the ground over a spot where an aloe was just starting from the earth, and before a day had gone by, the leaves would grow completely through the body.

I briefly mention these examples in order to show how all nature is linked together, and that the hibernation of animals and the growth of vegetables are parts of one great system.

Owing to the manner in which the squirrel disperses his treasures, we can not tell the amount of the store required by each animal, but in Northern America we find one which gives the needful information. This is the chipping squirrel, chipmunk, so called from its cry. Its scientific name is Tamias Lysteri.

It is a little creature not larger than a two-thirds grown rat, and is very conspicuous on account of the black and yellow stripes which run along its back. Being a creature which leads a subterranean life for the greatest part of its time, it does not possess the bushy tail of the tree-inhabiting squirrels.

Its underground habitation is a most elaborate composition of galleries and chambers, so that there is plenty of space for storage. Audubon once dug up a nest inhabited by four chipping squirrels, and found in it two pecks of acorns, a quart of large nuts, rather more than two quarts of buckwheat, besides about half a pint of grass seeds and ordinary wheat. Considering that the animals would pass the greater portion of the winter months in lethargy, and would only eat at long intervals, the amount of food is really surprising.

In former days, when the red men were supreme and depended solely on hunting for their food, many a tribe has been saved from extermination for want of food in the winter time by digging up the nests of the chipping squirrel, and eating the inhabitants as well as their stores.

In the dormouse we have another instance of hibernation brought into contact with man.

This pretty little creature, which is too familiar to need description, possesses in a great degree the power of becoming fat toward the end of autumn. The ancient Romans were well aware of this fact, and had regular establishments called “gliraria” for the express purpose of fattening dormice for the table.

The dormouse makes a singularly comfortable nest for itself. It is nearly spherical and is composed externally of grass blades woven together in a very ingenious manner. The animal only leaves a small aperture, concealed by grass blades which can be pulled asunder when the inmate enters or leaves the nest, and which resume their position like the folds of a drawn curtain. I once had a remarkably fine specimen of a dormouse nest which was cut out of a hedge. The curtain of grass blades was so admirably formed that it could seldom be detected by any one who did not know the specimen.

Around, but not in this nest, the dormouse places its store of winter food, which is much of the same nature as that of the squirrel, and mostly consists of nuts. For this reason the Germans call the creature by the appropriate name of hazelmaus.

It was made in the fork of a hazel-branch, and was about four feet from the ground, so that the small branches served to strengthen as well as conceal it. The nest was exactly six inches long by three in width, and was made almost entirely of several kinds of grass, the broad-bladed sword-grass being the chief material. Interwoven with the grass-blades were sundry leaves, all hazel and maple, and none of them having been taken from the branch on which the nest was built. It is therefore possible that a dormouse may have placed the nest in Mr. Waterton’s mill-stone. I do not, however, think it probable, because there was no bush near the stone, and, as far as is known, the dormouse always stores its food close to its nest. The squirrel, however, ranges farther afield, and may often be seen in the winter-time digging through the snow, at some distance from its tree, so as to disinter the hidden food.

Another vegetable-eating hibernating rodent is the too well-known hamster (Cricetus frumentarius) of Northern Europe.

It is about a foot in length, but, on account of its numbers, is a most formidable enemy to the agriculturist. Even when seeking its daily food it is terribly destructive to the crops, but its worst raids are made at the end of the autumn, when it provides a store for the winter. For this purpose it excavates a deep and complicated system of burrows, in which it stores a quantity of grain so enormous that after the harvest the farmers are in the habit of digging up the hamster’s burrows and securing their stolen property.

A single hamster carried off sixty pounds of wheat for its winter store, while another had thought that a hundred weight of beans were necessary for its subsistence. The animal wakes very early from its hibernation, sometimes even in February. It does not, however, come out of its burrow at once, but remains beneath the earth until the warm weather has fairly set in.

Now we come to the bears.

I need not say that intertropical bears do not require to hibernate. Moreover of those bears which inhabit the colder climates the adult males seldom, if ever, hibernate, while the young of both sexes are very uncertain in this respect. For example, with the grizzly bear the young males and females are found at large throughout the whole of winter, and the same is the case with the polar bear. With the brown bear of Northern Europe and the black bear of North America the young animals seem to be rather capricious in hibernating.

In all cases, however, when the adult female bear is about to add to the family she prepares for hibernating. With the exception of the polar bear, who is obliged to form a most remarkable habitation, the female chooses a safe retreat long before it is required, and gradually conveys into it a large quantity of leaves, moss, and small branches, so as to make a comfortable bed.

Shortly before hibernating she becomes enormously fat, and the new fur which she puts on is quite half as long again as that of the summer raiment. Hunters, therefore, are naturally anxious to kill the bear just before hibernating.

In the first place, a fully developed winter fur, taken before it has been injured by use, will sell for twice as much money as the fur of the same animal when taken in summer or after hibernating. In the next place, the fat, which is so well-known as “bear’s-grease,” always commands a ready sale. Lastly, as bear’s meat, prepared either by freezing or smoking, forms the greatest part of winter food in many a family, it is a matter of the greatest consequence to have that meat in the best condition.

How valuable it is under such circumstances may be realized by reading the life of the old American hunter, Daniel Boone, and seeing how, when his wife and children were nearly dying of hunger and cold, he forced his way across the half-frozen river, succeeded in killing a bear, and by almost superhuman exertions transported all the meat across the river to his hut.

Supposing that the bear is not interrupted in her work, she retires to the den just before winter, and closes the entrance as well as she can.

In this place of refuge the young are born. They are at first scarcely larger than rats, but increase in size, drawing the whole of their nourishment from their mother, who takes no food during the whole of the winter and early spring. In consequence, when she and her young emerge, the latter are fat and strong, while the mother is but the shadow of her former self. Here again is a wonderful example of the many ways in which God “giveth meat to all flesh.”

When a male or young female hibernates it comes out of its refuge as fat as it was on entering it. The hibernation is so perfect that there is scarcely any waste of tissue, as is the case with the mother bear, whose young practically subsist on the store of fat which she laid up in the autumn.

The polar bear when about to become a mother is obliged to find a very different kind of refuge, as there are neither caves, hollow trees, or branches, and often there is nothing but ice as a resting-place and snow as a covering. So she depends for shelter upon the snow. After selecting a convenient snow-drift, she scrapes a hole in it, and suffers the snow to fall upon her as it will.

In that country, where even the human inhabitants are obliged to make their houses out of snow or perish, she is soon buried under many feet of snow. Her thick fur keeps the snow from contact with the skin, while the heat of her body gradually melts the snow away from around her, so that she lies in a sort of tent.

Now comes the question, ventilation. Were she alone all the time she would need no communication with the external air, as the hibernation would be perfect, and respiration would not be required. But her young, who do not hibernate, must breathe continually from the time of their birth, and she, being disturbed by them, is forced to breathe occasionally.

Now, it is found that when animals are buried under snow their warm breath continually ascends, and makes a passage into the air. The aperture is a very small one, but quite sufficient for the purpose; and even in our Scotch Highlands sheep are enabled to breathe in a similar manner when buried in the terrible snow-drifts, which are apt to overwhelm whole flocks at a time.—London Sunday Magazine.