These hollow trees, according to woodcraft, ought to come down by the axe without further loss of time. Yet it is fortunate that we are not all of us, even in this prosaic age, imbued with the stern utilitarian spirit; for a decaying tree is perhaps more interesting than one in full vigour of growth. The starlings make their nests in the upper knot-holes; or, lower down, the owl feeds her young; and if you chance to pass near, and are not aware of the ways of owls, you may fancy that a legion of serpents are in the bushes, so loud and threatening is the hissing noise made by the brood. The woodpecker comes for the insects that flourish on the dying giant; so does the curious little tree-climber, running up the trunk like a mouse; and in winter, when insect-life is scarce, it is amusing to watch there the busy tomtit. He hangs underneath a dead branch, head downwards, as if walking on a ceiling, and with his tiny but strong bill chips off a fragment of the loose dead bark. Under this bark, as he well knows, woodlice and all kinds of creeping things make their home. With the fragment he flies to an adjacent twig, small enough to be grasped by his claws and so give him a firm foothold. There he pecks his morsel into minute pieces and lunches on the living contents. Then, with a saucy chuckle of delight in his own cleverness, he returns to the larger bough for a fresh supply. As the bough decays the bark loosens, and is invaded by insects which when it was green could not touch it.
For the acorns the old oak still yields come rooks, pigeons, and stately pheasants, with their glossy feathers shining in the autumn sun. Thrushes carry wild hedge-fruit up on the broad platform formed by the trunk where the great limbs divide, and pecking it to pieces, leave the seeds. These take root in the crevices which widen out underneath into a mass of soft decaying ‘touchwood;’ and so from the crown of the tree there presently stream downwards long trailing briers, bearing in June the sweet wild roses and in winter red oval fruit. Ivy comes creeping up, and in its thick warm coverts nests are built. Below, among the powdery ‘touchwood’ which lines the floor of this living hut, great fungi push their coloured heads up to the light. And here you may take shelter when the rain comes unexpectedly pattering on the leaves, and listen as it rises to a roar within the forest. Sometimes wild bees take up their residence in the hollow, slowly filling it with comb, buzzing busily to and fro; and then it is not to be approached so carelessly, though so ready are all creatures to acknowledge kindness that ere now I have even made friends with the inhabitants of a wasp’s nest.
A thick carpet of dark green moss grows upon one side of the tree, and over it the tall brake fern rears its yellow stem. In the evening the goat-sucker or nightjar comes with a whirling phantom-like flight, wheeling round and round: a strange bird, which will roost all day on a rail, blinking or sleeping in the daylight, and seeming to prefer a rail or a branch without leaves to one that affords cover. Here also the smaller bats flit in the twilight, and, if you stand still, will pursue their prey close to your head, wheeling about it so that you may knock them down with your hand if you wish. The labouring people call the bat ‘bat-mouse.’ Here also come many beetles; and sometimes on a summer’s day the swallows will rest from their endless flight on the dying upper branches, for they too like a bough clear or nearly clear of leaves. All the year through the hollow tree is haunted by every kind of living creature, and therefore let us hope it may yet be permitted to linger awhile safe from the axe.
The lesser roots of the elm are porous like cane, and are sometimes smoked as cigars by the ploughboys. The leaf of the coltsfoot, which grows so luxuriantly in many places and used to be regularly gathered and dried by the lower classes for the pipe, is now rarely used since the commoner tobaccos have become universally accessible.
Often and often, when standing in a meadow gateway partly hidden by the bushes, watching the woodpecker on the ant-hills, of whose eggs, too, the partridges are so fond (so that a good ant year, in which their nests are prolific, is also a good partridge year), you may, if you are still, hear a slight faint rustle in the hedge, and by-and-bye a weasel will steal out. Seeing you he instantly pauses, elevates his head, and steadily gazes: move but your eyes and he is back in the hedge; remain quiet, still looking straight before you as if you saw nothing, and he will presently recover confidence, and actually cross the gateway almost under you.
This is the secret of observation: stillness, silence, and apparent indifference. In some instinctive way these wild creatures learn to distinguish when one is or is not intent upon them in a spirit of enmity; and if very near, it is always the eye they watch. So long as you observe them, as it were, from the corner of the eyeball, sideways, or look over their heads at something beyond, it is well. Turn your glance full upon them to get a better view, and they are gone.
When waiting in a dry ditch with a gun on a warm autumn afternoon for a rabbit to come out, sometimes a bunny will suddenly appear at the mouth of a hole which your knee nearly touches. He stops dead, as if petrified with astonishment, sitting on his haunches. His full dark eye is on you with a gaze of intense curiosity; his nostrils work as if sniffing; his whiskers move; and every now and then he thumps with his hind legs upon the earth with a low dull thud. This is evidently a sign of great alarm, at the noise of which any other rabbit within hearing instantly disappears in the ‘bury.’ Yet there your friend sits and watches you as if spell-bound, so long as you have the patience neither to move hand or foot, nor to turn your eye. Keep your glance on a frond of the fern just beyond him, and he will stay. The instant your eye meets his or a finger stirs, he plunges out of sight.
It is so also with birds. Walk across a meadow swinging a stick, even humming, and the rooks calmly continue their search for grubs within thirty yards; stop to look at them, and they rise on the wing directly. So, too, the finches in the trees by the roadside. Let the wayfarer pass beneath the bough on which they are singing, and they will sing on, if he moves without apparent interest; should he pause to listen, their wings glisten in the sun as they fly.
The meadows lead down to the shores of the mere, and the nearest fields melt almost insensibly into the green margin of the water, for at the edge it is so full of flags, and rushes, and weeds, as at a distance to be barely distinguishable there from the sward. As we approach, the cuckoo sings passing over head; ‘she cries as she flies’ is the common country saying.
I used to imagine that the cuckoo was fond of an echo, having noticed that a particular clump of trees overhanging some water, the opposite bank of which sent back a clear reply, was a specially favourite resort of that bird. The reduplication of the liquid notes, as they travelled to and fro, was peculiarly pleasant: the water, perhaps, lending, like a sounding-board, a fulness and roundness to her song. She might possibly have fancied that another bird was answering; certainly she ‘cried’ much longer there than in other places. Morning after morning, and about the same time—eleven o’clock—a cuckoo sang in that group of trees, from noting which I was led to think that perhaps the cuckoo, though apparently wandering aimlessly about, really has more method and regularity in her habits than would seem.