The decayed hollows which we have mentioned as so often productive of little owls have their possibilities by no means exhausted by one visit. The disturbed owl may take himself elsewhere, after being so unceremoniously disturbed; but there are roving, tramp-like characters, with dispositions taking them here and there through the winter nights, to whom, at break of day, a hole is ever a sought-for haven.

So do not put your hand too recklessly into an owl hole, for a hiss and a sudden nip may show that an opossum has taken up his quarters there. If you must, pull him out by his squirming, naked tail, but do not carry him home, as he makes a poor pet, and between hen-house traps and irate farmers, he has good reason, in this part of the country at least, to be short tempered.

Of course the birds’-nests are all deserted now, but do not be too sure of the woodpeckers’ holes. The little downy and his larger cousin, the hairy woodpecker, often spend the winter nights snug within deep cavities which they have hollowed out, each bird for itself. I have never known a pair to share one of these shelters.

Sometimes, in pulling off the loose bark from a decayed stump, several dry, flattened scales will fall out upon the snow among the debris of wood and dead leaves. Hold them close in the warm palm of your hand for a time and the dried bits will quiver, the sides partly separate, and behold! you have brought back to life a beautiful Euvanessa, or mourning-cloak butterfly. Lay it upon the snow and soon the awakened life will ebb away and it will again be stiff, as in death. If you wish, take it home, and you may warm it into activity, feed it upon a drop of syrup and freeze it again at will. Sometimes six or eight of these insects may be found sheltered under the bark of a single stump, or in a hollow beneath a stone. Several species share this habit of hibernating throughout the winter.

Look carefully in old, deserted sheds, in half-sheltered hollows of trees, or in deep crevice-caverns in rocks, and you may some day spy one of the strangest of our wood-folk. A poor little shrivelled bundle of fur, tight-clasped in its own skinny fingers, with no more appearance of life in its frozen body than if it were a mummy from an Egyptian tomb; such is the figure that will meet your eye when you chance upon a bat in the deep trance of its winter’s hibernation. Often you will find six or a dozen of these stiffened forms clinging close together, head downward.

As in the case of the sleeping butterfly, carry one of the bats to your warm room and place him in a bird-cage, hanging him up on the top wires by his toes, with his head downward. The inverted position of these strange little beings always brings to mind some of the experiences of Gulliver, and indeed the life of a bat is more wonderful than any fairy tale.

Probably the knowledge of bats which most of us possess is chiefly derived from the imaginations of artists and poets, who, unlike the Chinese, do not look upon these creatures with much favour, generally symbolising them in connection with passages and pictures which relate to the infernal regions. All of which is entirely unjust. Their nocturnal habits and our consequent ignorance of their characteristics are the only causes which can account for their being associated with the realm of Satan. In some places bats are called flittermice, but they are more nearly related to moles, shrews, and other insect-eaters than they are to mice. If we look at the skeleton of an animal which walks or hops we will notice that its hind limbs are much the stronger, and that the girdle which connects these with the backbone is composed of strong and heavy bones. In bats a reverse condition is found; the breast girdle, or bones corresponding to our collar bones and shoulder blades, are greatly developed. This, as in birds, is, of course, an adaptation to give surface for the attachment of the great propelling muscles of the wings.

Although the hand of a bat is so strangely altered, yet, as we shall see if we look at our captive specimen, it has five fingers, as we have, four of which are very long and thin, and the webs, of which we have a very noticeable trace in our own hands, stretch from finger-tip to finger-tip, and to the body and even down each leg, ending squarely near the ankle, thus giving the creature the absurd appearance of having on a very broad, baggy pair of trousers.

When thoroughly warmed up, our bat will soon start on a tour of inspection of his cage. He steps rapidly from one wire to another, sometimes hooking on with all five toes, but generally with four or three. There seems to be little power in these toes, except of remaining bent in a hooked position; for when our bat stops and draws up one foot to scratch the head, the claws are merely jerked through the fur by motions of the whole leg, not by individual movements of the separate toes. In this motion we notice, for the first time, that the legs and feet grow in a kind of “spread eagle” position, making the knees point backward, in the same direction as the elbows.

We must stop a moment to admire the beautiful soft fur, a golden brown in colour, with part of the back nearly black. The tiny inverted face is full of expression, the bead-like eyes gleaming brightly from out of their furry bed. The small moist nostrils are constantly wrinkling and sniffling, and the large size of the alert ears shows how much their owner depends upon them for information. If we suddenly move up closer to the wires, the bat opens both wings owl-like, in a most threatening manner; but if we make still more hostile motions the creature retreats as hastily as it can, changing its method of progress to an all-fours, sloth-like gait, the long free thumb of each hand grasping wire after wire and doing most of the leverage, the hind legs following passively.

When at what he judges a safe distance he again hangs pendent, bending his head back to look earnestly at us. Soon the half-opened wings are closed and brought close to the shoulders, and in this, the usual resting position, the large claws of the thumbs rest on the breast in little furrows which they have worn in the fur.

Soon drowsiness comes on and a long elaborate yawn is given, showing the many small needle-like teeth and the broad red tongue, which curls outward to a surprising length. Then comes the most curious process of all. Drawing up one leg, the little creature deliberately wraps one hand with its clinging web around the leg and under the arms, and then draws the other wing straight across the body, holds it there a moment, while it takes a last look in all directions. Then lifting its fingers slightly, it bends its head and wraps all in the full-spread web. It is most ludicrously like a tragedian, acting the death scene in “Julius CÆsar,” and it loses nothing in repetition; for each time the little animal thus draws its winding sheet about its body, one is forced to smile as he thinks of the absurd resemblance.

But all this and much more you will see for yourself, if you are so fortunate as to discover the hiding-place of the hibernating bat.

Our little brown bat is a most excellent mother, and when in summer she starts out on her nocturnal hunts she takes her tiny baby bat with her. The weird little creature wraps his long fingers about his mother’s neck and off they go. When two young are born, the father bat is said sometimes to assume entire control of one.

After we come to know more of the admirable family traits of the fledermaus—its musical German name—we shall willingly defend it from the calumny which for thousands of years has been heaped upon it.

Hibernation is a strange phenomenon, and one which is but little understood. If we break into the death-like trance for too long a time, or if we do not supply the right kind of food, our captive butterflies and bats will perish. So let us soon freeze them up again and place them back in the care of old Nature. Thus the pleasure is ours of having made them yield up their secrets, without any harm to them. Let us fancy that in the spring they may remember us only as a strange dream which has come to them during their long sleep.