Part 19

Let us think of the meaning of form. Take, for example, a flower--a daisy. Now, if we could imagine such an impossible thing as that a daisy blossom should leave its place of growth, creep down the stem and go wandering off through the grass, soon something would probably happen to its shape. It would perhaps get in the habit of creeping with some one ray always in front, and the friction of the grass stems on either side would soon wear and fray the ends of the side rays, while those behind might grow longer and longer. If we further suppose that this strange daisy flower did not like the water, the rays in front might be of service in warning it to turn aside. When their tips touched the surface and were wet by the water of some pool, the ambulatory blossom would draw back and start out in a new direction. Thus a theoretical head (with the beginnings of the organs of sense), and a long-drawn-out tail, would have their origin.

Such a remarkable simile is not as fanciful as it might at first appear; for although we know of no blossom which so sets at naught the sedentary life of the vegetable kingdom, yet among certain of the animals which live their lives beneath the waves of the sea a very similar thing occurs.

Many miles inland, even on high mountains, we may sometimes see thousands of little joints, or bead-like forms, imbedded in great rocky cliffs. They have been given the name of St. Cuthbert's beads. Occasionally in the vicinity of these fossils--for such they are--are found impressions of a graceful, flower-like head, with many delicately divided petals, fixed forever in the hard relief of stone. The name of stone lilies has been applied to them. The beads were once strung together in the form of a long stem, and at the top the strangely beautiful animal-lily nodded its head in the currents of some deep sea, which in the long ago of the earth's age covered the land--millions of years before the first man or beast or bird drew breath.

It was for a long time supposed that these wonderful creatures were extinct, but dredges have brought up from the dark depths of the sea actual living stone lilies, or crinoids, this being their real name. Few of us will probably ever have an opportunity of studying a crinoid alive, although in our museums we may see them preserved in glass jars. That, however, detracts nothing from the marvel of their history and relationship. They send root-like organs deep into the mud, where they coil about some shell and there cling fast. Then the stem grows tall and slender, and upon the summit blooms or is developed the animal-flower. Its nourishment is not drawn from the roots and the air, as is that of the daisy, but is provided by the tiny creatures which swim to its tentacles, or are borne thither by the ocean currents. Some of these crinoids, as if impatient of their plant-like life and asserting their animal kinship, at last tear themselves free from their stem and float off, turn over, and thereafter live happily upon the bottom of the sea, roaming where they will, creeping slowly along and fulfilling the destiny of our imaginary daisy.

And here a comparison comes suddenly to mind. How like to a many-rayed starfish is our creeping crinoid! Few of us, unless we had studies about these creatures, could distinguish between a crinoid and one of the frisky little dancing stars, or serpent stars, which are so common in the rocky caves along our coast. This relationship is no less real than apparent. The hard-skinned "five finger," or common starfish, which we may pick up on any beach, while it never grew upon a stem, yet still preserves the radial symmetry of its stalked ancestors. Pick up your starfish, carry it to the nearest field, and pluck a daisy close to the head. How interesting the comparison becomes, now that the knowledge of its meaning is plain. Anything which grows fast upon a single immovable stem tends to grow equally in all directions. We need not stop here, for we may include sea anemones and corals, those most marvellously coloured flowers of the sea, which grow upon a short, thick stalk and send out their tentacles equally in all directions. And many of the jelly-fish which throb along close beneath the surface swells were in their youth each a section of a pile of saucer-like individuals, which were fastened by a single stalk to some shell or piece of coral.

We will remember that it was suggested that the theoretical daisy would soon alter its shape after it entered upon active life. This is plainly seen in the starfish, although at first glance the creature seems as radially symmetrical as a wheel. But at one side of the body, between two of the arms, is a tiny perforated plate, serving to strain the water which enters the body, and thus the circular tendency is broken, and a beginning made toward right and left handedness. In certain sea-urchins, which are really starfishes with the gaps between the arms filled up, the body is elongated, and thus the head and tail conditions of all animals higher in the scale of life are represented.

THE DREAM OF THE YELLOW-THROAT

Many of us look with longing to the days of Columbus; we chafe at the thought of no more continents to discover; no unknown seas to encompass. But at our very doors is an "undiscovered bourne," from which, while the traveller invariably returns, yet he will have penetrated but slightly into its mysteries. This unexplored region is night.

When the dusk settles down and the creatures of sunlight seek their rest, a new realm of life awakens into being. The flaring colours and loud bustle of the day fade and are lost, and in their place come soft, gray tones and silence. The scarlet tanager seeks some hidden perch and soon from the same tree slips a silent, ghostly owl; the ruby of the hummingbird dies out as the gaudy flowers of day close their petals, and the gray wraiths of sphinx moths appear and sip nectar from the spectral moonflowers.

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With feet shod with silence, let us creep near a dense tangle of sweetbrier and woodbine late some summer evening and listen to the sounds of the night-folk. How few there are that our ears can analyse! We huddle close to the ground and shut our eyes. Then little by little we open them and set our senses of sight and hearing at keenest pitch. Even so, how handicapped are we compared to the wild creatures. A tiny voice becomes audible, then dies away,--entering for a moment the narrow range of our coarse hearing,--and finishing its message of invitation or challenge in vibrations too fine for our ears.

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Were we crouched by a dense yew hedge, bordering an English country lane, a nightingale might delight us,--a melody of day, softened, adapted, to the night. If the air about us was heavy with the scent of orange blossoms of some covert in our own southland, the glorious harmony of a mockingbird might surge through the gloom,--assuaging the ear as do the blossoms another sense.

But sitting still in our own home tangle let us listen,--listen. Our eyes have slipped the scales of our listless civilised life and pierce the darkness with the acuteness of our primeval forefathers; our ears tingle and strain.

A slender tongue of sound arises from the bush before us. Again and again it comes, muffled but increasing in volume. A tiny ball of feathers is perched in the centre of the tangle, with beak hidden in the deep, soft plumage, but ever and anon the little body throbs and the song falls gently on the silence of the night: "I beseech you! I beseech you! I beseech you!" A Maryland yellow-throat is asleep and singing in its dreams.

As we look and listen, a shadowless something hovers overhead, and, looking upward, we see a gray screech owl silently hanging on beating wings. His sharp ears have caught the muffled sound; his eyes search out the tangle, but the yellow-throat is out of reach. The little hunter drifts away into the blackness, the song ends and the sharp squeak of a mouse startles us. We rise slowly from our cramped position and quietly leave the mysteries of the night.

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SEPTEMBER

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THE PASSING OF THE FLOCKS

It is September. August--the month of gray days for birds--has passed. The last pin-feather of the new winter plumage has burst its sheath, and is sleek and glistening from its thorough oiling with waterproof dressing, which the birds squeeze out with their bills from a special gland, and which they rub into every part of their plumage. The youngsters, now grown as large as their parents, have become proficient in fly-catching or berry-picking, as the case may be. Henceforth they forage for themselves, although if we watch carefully we may still see a parent's love prompting it to give a berry to its big offspring (indistinguishable save for this attention), who greedily devours it without so much as a wing flutter of thanks.

Two courses are open to the young birds who have been so fortunate as to escape the dangers of nestlinghood. They may unite in neighbourly flocks with others of their kind, as do the blackbirds of the marshes; or they may wander off by themselves, never going very far from their summer home, but perching alone each night in the thick foliage of some sheltering bush.

How wonderfully the little fellow adapts himself to the radical and sudden change in his life! Before this, his world has been a warm, soft-lined nest, with ever anxious parents to shelter him from rain and cold, or to stand with half-spread wings between him and the burning rays of the sun. He has only to open his mouth and call for food and a supply of the choicest morsels appears and is shoved far down his throat. If danger threatens, both parents are ready to fight to the last, or even willing to give their lives to protect him. Little wonder is it that the young birds are loth to leave; we can sympathise heartily with the last weaker brother, whose feet cling convulsively to the nest, who begs piteously for "just one more caterpillar!" But the mother bird is inexorable and stands a little way out of reach with the juiciest morsel she can find. Once out, the young bird never returns. Even if we catch the little chap before he finishes his first flight and replace him, the magic spell of home is broken, and he is out again the instant our hand frees him.

What a change the first night brings! Yet with unfailing instinct he squats on some twig, fluffs up his feathers, tucks his wee head behind his wing, and sleeps the sleep of his first adult birdhood as soundly as if this position of rest had been familiar to him since he broke through the shell.

We admire his aptitude for learning; how quickly his wings gain strength and skill; how soon he manages to catch his own dinner. But how all this pales before the accomplishment of a young brush turkey or moundbuilder of the antipodes. Hatched six or eight feet under ground, merely by the heat of decaying vegetation, no fond parents minister to his wants. Not only must he escape from the shell in the pressure and darkness of his underground prison (how we cannot tell), but he is then compelled to dig through six feet of leaves and mould before he reaches the sunlight. He finds himself well feathered, and at once spreads his small but perfect wings and goes humming off to seek his living alone and unattended.

It is September--the month of restlessness for the birds. Weeks ago the first migrants started on their southward journey, the more delicate insect-eaters going first, before the goldfinches and other late nesters had half finished housekeeping. The northern warblers drift past us southward--the magnolia, blackburnian, Canadian fly-catching, and others, bringing memories of spruce and balsam to those of us who have lived with them in the forests of the north.

"It's getting too cold for the little fellows," says the wiseacre, who sees you watching the smaller birds as they pass southward. Is it, though? What of the tiny winter wren which spends the zero weather with us? His coat is no warmer than those birds which have gone to the far tropics. And what of the flocks of birds which we occasionally come across in mid-winter, of species which generally migrate to Brazil? It is not the cold which deprives us of our summer friends, or at least the great majority of them; it is the decrease in food supply. Insects disappear, and only those birds which feed on seeds and buds, or are able to glean an insect diet from the crevices of fence and tree-trunk, can abide.

This is the month to climb out on the roof of your house, lie on your back and listen. He is a stolid person indeed who is not moved by the chirps and twitters which come down through the darkness. There is no better way to show what a wonderful power sound has upon our memories. There sounds a robin's note, and spring seems here again; through the night comes a white-throat's chirp, and we see again the fog-dimmed fields of a Nova Scotian upland; a sandpiper "peets" and the scene in our mind's eye as instantly changes, and so on. What a revelation if we could see as in daylight for a few moments! The sky would be pitted with thousands and thousands of birds flying from a few hundred yards to as high as one or two miles above the earth.