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Читать книгу: «Ways of Nature», страница 6

John Burroughs
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Indeed, if I had elk and deer and caribou and moose and bears and wildcats and beavers and otters and porcupines on my farm, I should expect them to behave just as they do in other parts of the country under like conditions: they would be tame and docile if I did not molest them, and wild and fierce if I did. They would do nothing out of character in either case.

Your natural history knowledge of the East will avail you in the West. There is no country, says Emerson, in which they do not wash the pans and spank the babies; and there is no country where a dog is not a dog, or a fox a fox, or where a hare is ferocious, or a wolf lamblike. The porcupine behaves in the Rockies just as he does in the Catskills; the deer and the moose and the black bear and the beaver of the Pacific slope are almost identical in their habits and traits with those of the Atlantic slope.

In my observations of the birds of the far West, I went wrong in my reckoning but once: the Western meadowlark has a new song. How or where he got it is a mystery; it seems to be in some way the gift of those great, smooth, flowery, treeless, dimpled hills. But the swallow was familiar, and the robin and the wren and the highhole, while the woodchuck I saw and heard in Wyoming might have been the "chuck" of my native hills. The eagle is an eagle the world over. When I was a boy I saw, one autumn day, an eagle descend with extended talons upon the backs of a herd of young cattle that were accompanied by a cosset-sheep and were feeding upon a high hill. The object of the eagle seemed to be to separate the one sheep from the cattle, or to frighten them all into breaking their necks in trying to escape him. But neither result did he achieve. In the Yellowstone Park, President Roosevelt and Major Pitcher saw a golden eagle trying the same tactics upon a herd of elk that contained one yearling. The eagle doubtless had his eye upon the yearling, though he would probably have been quite satisfied to have driven one of the older ones down a precipice. His chances of a dinner would have been equally good.

There is one particular in which the bird families are much more human than our four-footed kindred. I refer to the practice of courtship. The male of all birds, so far as I know, pays suit to the female and seeks to please and attract her.2 This the quadrupeds do not do; there is no period of courtship among them, and no mating or pairing as among the birds. The male fights for the female, but he does not seek to win her by delicate attentions. If there are any exceptions to this rule, I do not know them. There seems to be among the birds something that is like what is called romantic love. The choice of mate seems always to rest with the female,3 while among the mammals the female shows no preference at all.

Among our own birds, the prettiest thing I know of attending the period of courtship, or preliminary to the match-making, is the spring musical festival and reunion of the goldfinches, which often lasts for days, through rain and shine. In April or May, apparently all the goldfinches from a large area collect in the top of an elm or a maple and unite in a prolonged musical festival. Is it a contest among the males for the favor of the females, or is it the spontaneous expression of the gladness of the whole clan at the return of the season of life and love? The birds seem to pair soon after, and doubtless the concert of voices has some reference to that event.

There is one other human practice often attributed to the lower animals that I must briefly consider, and that is the practice, under certain circumstances, of poisoning their young. One often hears of caged young birds being fed by their parents for a few days and then poisoned; or of a mother fox poisoning her captive young when she finds that she cannot liberate him; and such stories obtain ready credence with the public, especially with the young. To make these stories credible, one must suppose a school of pharmacy, too, in the woods.

"The worst thing about these poisoning stories," writes a friend of mine, himself a writer of nature-books, "is the implied appreciation of the full effect and object of poison – the comprehension by the fox, for instance, that the poisoned meat she may be supposed to find was placed there for the object of killing herself (or some other fox), and that she may apply it to another animal for that purpose. Furthermore, that she understands the nature of death – that it brings 'surcease of sorrow,' and that death is better than captivity for her young one. How did she acquire all this knowledge? Where was her experience of its supposed truth obtained? How could she make so fine and far-seeing a judgment, wholly out of the range of brute affairs, and so purely philosophical and humanly ethical? It violates every instinct and canon of natural law, which is for the preservation of life at all hazards. This is simply the human idea of 'murder.' Animals kill one another for food, or in rivalry, or in blind ferocity of predatory disposition; but there is not a particle of evidence that they 'commit murder' for ulterior ends. It is questionable whether they comprehend the condition called death, or its nature, in any proper sense."

On another occasion I laughed at a recent nature writer for his credulity in half-believing the story told him by a fisherman, that the fox catches crabs by using his tail as a bait; and yet I read in Romanes that Olaus, in his account of Norway, says he has seen a fox do this very thing among the rocks on the sea-coast.4 One would like to cross-question Olaus before accepting such a statement. One would as soon expect a fox to put his brush in the fire as in the water. When it becomes wet and bedraggled, he is greatly handicapped as to speed. There is no doubt that rats will put their tails into jars that contain liquid food they want, and then lick them off, as Romanes proved; but the rat's tail is not a brush, nor in any sense an ornament. Think what the fox-and-crab story implies! Now the fox is entirely a land animal, and lives by preying upon land creatures, which it follows by scent or sight. It can neither see nor smell crabs in the deep water, where crabs are usually found. How should it know that there are such things as crabs? How should it know that they can be taken with bait and line or by fishing for them? When and how did it get this experience? This knowledge belongs to man alone. It comes through a process of reasoning that he alone is capable of. Man alone of land animals sets traps and fishes. There is a fish called the angler (Lophius piscatorius), which, it is said on doubtful authority, by means of some sort of appendages on its head angles for small fish; but no competent observer has reported any land animal doing so. Again, would a crab lay hold of a mass of fur like a fox's tail? – even if the tail could be thrust deep enough into the water, which is impossible. Crabs, when not caught with hand-nets, are usually taken in water eight or ten feet deep. They are baited and caught with a piece of meat tied to a string, but cannot be lifted to the surface till they are eating the meat, and then a dip-net is required to secure them. The story, on the whole, is one of the most preposterous that ever gained credence in natural history.

Good observers are probably about as rare as good poets. Accurate seeing, – an eye that takes in the whole truth, and nothing but the truth, – how rare indeed it is! So few persons know or can tell exactly what they see; so few persons can draw a right inference from an observed fact; so few persons can keep from reading their own thoughts and preconceptions into what they see; only a person with the scientific habit of mind can be trusted to report things as they are. Most of us, in observing the wild life about us, see more or see less than the truth. We see less when our minds are dull, or preoccupied, or blunted by want of interest. This is true of most country people. We see more when we read the lives of the wild creatures about us in the light of our human experience, and impute to the birds and beasts human motives and methods. This is too often true of the eager city man or woman who sallies out into the country to study nature.

The tendency to sentimentalize nature has, in our time, largely taken the place of the old tendency to demonize and spiritize it. It is anthropomorphism in another form, less fraught with evil to us, but equally in the way of a clear understanding of the life about us.

VII
DEVIOUS PATHS

There is no better type or epitome of wild nature than the bird's-nest – something built, and yet as if it grew, a part of the ground, or of the rock, or of the branch upon which it is placed; beginning so coarsely, so irregularly, and ending so finely and symmetrically; so unlike the work of hands, and yet the result of a skill beyond hands; and when it holds its complement of eggs, how pleasing, how suggestive!

The bird adapts means to an end, and yet so differently from the way of man, – an end of which it does not know the value or the purpose. We know it is prompted to it by the instinct of reproduction. When the woodpecker in the fall excavates a lodge in a dry limb, we know he is prompted to it by the instinct of self-preservation, but the birds themselves obey the behests of nature without knowledge.

A bird's-nest suggests design, and yet it seems almost haphazard; the result of a kind of madness, yet with method in it. The hole the woodpecker drills for its cell is to the eye a perfect circle, and the rim of most nests is as true as that of a cup. The circle and the sphere exist in nature; they are mother forms and hold all other forms. They are easily attained; they are spontaneous and inevitable. The bird models her nest about her own breast; she turns round and round in it, and its circular character results as a matter of course. Angles, right lines, measured precision, so characteristic of the works of man, are rarely met with in organic nature.

Nature reaches her ends by devious paths; she loiters, she meanders, she plays by the way; she surely "arrives," but it is always in a blind, hesitating, experimental kind of fashion. Follow the tunnels of the ants or the crickets, or of the moles and the weasels, underground, or the courses of the streams or the paths of the animals above ground – how they turn and hesitate, how wayward and undecided they are! A right line seems out of the question.

The oriole often weaves strings into her nest; sometimes she binds and overhands the part of the rim where she alights in going in, to make it stronger, but it is always done in a hit-or-miss, childish sort of way, as one would expect it to be; the strings are massed, or snarled, or left dangling at loose ends, or are caught around branches; the weaving and the sewing are effective, and the whole nest is a marvel of blind skill, of untaught intelligence; yet how unmethodical, how delightfully irregular, how unmistakably a piece of wild nature!

Sometimes the instinct of the bird is tardy, and the egg of the bird gets ripe before the nest is ready; in such a case the egg is of course lost. I once found the nest of the black and white creeping warbler in a mossy bank in the woods, and under the nest was an egg of the bird. The warbler had excavated the site for her nest, dropped her egg into it, and then gone on with her building. Instinct is not always inerrant. Nature is wasteful, and plays the game with a free hand. Yet what she loses on one side she gains on another; she is like that least bittern Mr. Frank M. Chapman tells about. Two of the bittern's five eggs had been punctured by the long-billed marsh wren. When the bird returned to her nest and found the two eggs punctured, she made no outcry, showed no emotion, but deliberately proceeded to eat them. Having done this, she dropped the empty shells over the side of the nest, together with any straws that had become soiled in the process, cleaned her bill, and proceeded with her incubation. This was Nature in a nut-shell, – or rather egg-shell, – turning her mishaps to some good account. If the egg will not make a bird, it will make food; if not food, then fertilizer.

Among nearly all our birds, the female is the active business member of the partnership; she has a turn for practical affairs; she chooses the site of the nest, and usually builds it unaided. The life of the male is more or less a holiday or picnic till the young are hatched, when his real cares begin, for he does his part in feeding them. One may see the male cedar-bird attending the female as she is busy with her nest-building, but never, so far as I have observed, assisting her. One spring I observed with much interest a phœbe-bird building her nest not far from my cabin in the woods. The male looked on approvingly, but did not help. He perched most of the time on a mullein stalk near the little spring run where Phœbe came for mud. In the early morning hours she made her trips at intervals of a minute or two. The male flirted his tail and called encouragingly, and when she started up the hill with her load he would accompany her part way, to help her over the steepest part, as it were, then return to his perch and watch and call for her return. For an hour or more I witnessed this little play in bird life, in which the female's part was so primary and the male's so secondary. There is something in such things that seems to lend support to Professor Lester F. Ward's contention, as set forth in his "Pure Sociology," that in the natural evolution of the two sexes the female was first and the male second; that he was made from her rib, so to speak, and not she from his.

With our phalarope and a few Australian birds, the position of the two sexes as indicated above is reversed, the females having the ornaments and bright colors and doing the courting, while the male does the incubating. In a few cases also the female is much the more masculine, noisy, and pugnacious. With some of our common birds, such as the woodpeckers, the chickadee, and the swallows, both sexes take part in nest-building.

It is a very pretty sight to witness a pair of wood thrushes building their nest. Indeed, what is there about the wood thrush that is not pleasing? He is a kind of visible embodied melody. Some birds are so sharp and nervous and emphatic in their movements, as the common snowbird or junco, the flashing of whose white tail quills expresses the character of the bird. But all the ways of the wood thrush are smooth and gentle, and suggest the melody of its song. It is the only bird thief I love to see carrying off my cherries. It usually takes only those dropped upon the ground by other birds, and with the red or golden globe impaled upon its beak, its flight across the lawn is a picture delightful to behold. One season a pair of them built a nest in a near-by grove; morning after morning, for many mornings, I used to see the two going to and from the nest, over my vineyard and currant patch and pear orchard, in quest of, or bringing material for, the structure. They flew low, the female in the lead, the male just behind in line with her, timing his motions to hers, the two making a brown, gently undulating line, very pretty to look upon, from my neighbor's field where they obtained the material, to the tree that held the nest. A gentle, gliding flight, hurried but hushed, as it were, and expressive of privacy and loving preoccupation. The male carried no material; apparently he was simply the escort of his mate; but he had an air of keen and joyous interest. He never failed to attend her each way, keeping about a yard behind her, and flying as if her thought were his thought and her wish his wish. I have rarely seen anything so pretty in bird life. The movements of all our thrushes except the robin give one this same sense of harmony, – nothing sharp or angular or abrupt. Their gestures are as pleasing as their notes.

One evening, while seated upon my porch, I had convincing proof that musical or song contests do take place among the birds. Two wood thrashes who had nests near by sat on the top of a dead tree and pitted themselves against each other in song for over half an hour, contending like champions in a game, and certainly affording the rarest treat in wood thrush melody I had ever had. They sang and sang with unwearied spirit and persistence, now and then changing position or facing in another direction, but keeping within a few feet of each other. The rivalry became so obvious and was so interesting that I finally made it a point not to take my eyes from the singers. The twilight deepened till their forms began to grow dim; then one of the birds could stand the strain no longer, the limit of fair competition had been reached, and seeming to say, "I will silence you, anyhow," it made a spiteful dive at its rival, and in hot pursuit the two disappeared in the bushes beneath the tree. Of course I would not say that the birds were consciously striving to outdo each other in song; it was the old feud between males in the love season, not a war of words or of blows, but of song. Had the birds been birds of brilliant plumage, the rivalry would probably have taken the form of strutting and showing off their bright colors and ornaments.

An English writer on birds, Edmund Selous; describes a similar song contest between two nightingales. "Jealousy," he says, "did not seem to blind them to the merit of each other's performance. Though often one, upon hearing the sweet, hostile strains, would burst forth instantly itself, – and here there was no certain mark of appreciation, – yet sometimes, perhaps quite as often, it would put its head on one side and listen with exactly the appearance of a musical connoisseur, weighing, testing, and appraising each note as it issued from the rival bill. A curious, half-suppressed expression would steal, or seem to steal (for Fancy may play her part in such matters), over the listening bird, and the idea appear to be, 'How exquisite would be those strains were they not sung by – , and yet I must admit that they are exquisite.'" Fancy no doubt does play a part in such matters. It may well be doubted if birds are musical connoisseurs, or have anything like human appreciation of their own or of each other's songs. My reason for thinking so is this: I have heard a bobolink with an instrument so defective that its song was broken and inarticulate in parts, and yet it sang with as much apparent joy and abandon as any of its fellows. I have also heard a hermit thrush with a similar defect or impediment that appeared to sing entirely to its own satisfaction. It would be very interesting to know if these poor singers found mates as readily as their more gifted brothers. If they did, the Darwinian theory of "sexual selection" in such matters, according to which the finer songster would carry off the female, would fall to the ground. Yet it is certain that it is during the mating and breeding season that these "song combats" occur, and the favor of the female would seem to be the matter in dispute. Whether or not it be expressive of actual jealousy or rivalry, we have no other words to apply to it.

A good deal of light is thrown upon the ways of nature as seen in the lives of our solitary wasps, so skillfully and charmingly depicted by George W. Peckham and his wife in their work on those insects. So whimsical, so fickle, so forgetful, so fussy, so wise, and yet so foolish, as these little people are! such victims of routine and yet so individual, such apparent foresight and yet such thoughtlessness, at such great pains and labor to dig a hole and build a cell, and then at times sealing it up without storing it with food or laying the egg, half finishing hole after hole, and then abandoning them without any apparent reason; sometimes killing their spiders, at other times only paralyzing them; one species digging its burrow before it captures its game, others capturing the game and then digging the hole; some of them hanging the spider up in the fork of a weed to keep it away from the ants while they work at their nest, and running to it every few minutes to see that it is safe; others laying the insect on the ground while they dig; one species walking backward and dragging its spider after it, and when the spider is so small that it carries it in its mandible, still walking backward as if dragging it, when it would be much more convenient to walk forward. A curious little people, leading their solitary lives and greatly differentiated by the solitude, hardly any two alike, one nervous and excitable, another calm and unhurried; one careless in her work, another neat and thorough; this one suspicious, that one confiding; Ammophila using a pebble to pack down the earth in her burrow, while another species uses the end of her abdomen, – verily a queer little people, with a lot of wild nature about them, and a lot of human nature, too.

I think one can see how this development of individuality among the solitary wasps comes about. May it not be because the wasps are solitary? They live alone. They have no one to imitate; they are uninfluenced by their fellows. No community interests override or check individual whims or peculiarities. The innate tendency to variation, active in all forms of life, has with them full sway. Among the social bees or wasps one would not expect to find those differences between individuals. The members of a colony all appear alike in habits and in dispositions. Colonies differ, as every bee-keeper knows, but probably the members composing it differ very little. The community interests shape all alike. Is it not the same in a degree among men? Does not solitude bring out a man's peculiarities and differentiate him from others? The more one lives alone, the more he becomes unlike his fellows. Hence the original and racy flavor of woodsmen, pioneers, lone dwellers in Nature's solitudes. Thus isolated communities develop characteristics of their own. Constant intercommunication, the friction of travel, of streets, of books, of newspapers, make us all alike; we are, as it were, all pebbles upon the same shore, washed by the same waves.

Among the larger of vertebrate animals, I think, one might reasonably expect to find more individuality among those that are solitary than among those that are gregarious; more among birds of prey than among water-fowl, more among foxes than among prairie-dogs, more among moose than among sheep or buffalo, more among grouse than among quail. But I do not know that this is true.

Yet among none of these would one expect to find the diversity of individual types that one finds among men. No two dogs of the same breed will be found to differ as two men of the same family often differ. An original fox, or wolf, or bear, or beaver, or crow, or crab, – that is, one not merely different from his fellows, but obviously superior to them, differing from them as a master mind differs from the ordinary mind, – I think, one need not expect to find. It is quite legitimate for the animal-story writer to make the most of the individual differences in habits and disposition among the animals; he has the same latitude any other story writer has, but he is bound also by the same law of probability, the same need of fidelity to nature. If he proceed upon the theory that the wild creatures have as pronounced individuality as men have, that there are master minds among them, inventors and discoverers of new ways, born captains and heroes, he will surely "o'erstep the modesty of nature."

The great diversity of character and capacity among men doubtless arises from their greater and more complex needs, relations, and aspirations. The animals' needs in comparison are few, their relations simple, and their aspirations nil. One cannot see what could give rise to the individual types and exceptional endowments that are often claimed for them. The law of variation, as I have said, would give rise to differences, but not to a sudden reversal of race habits, or to animal geniuses.

The law of variation is everywhere operative – less so now, no doubt, than in the earlier history of organic life on the globe. Yet Nature is still experimenting in her blind way, and hits upon many curious differences and departures. But I suppose if the race of man were exterminated, man would never arise again. I doubt if the law of evolution could ever again produce him, or any other species of animal.

This principle of variation was no doubt much more active back in geologic time, during the early history of animal life upon the globe, than it is in this late age. And for the reason that animal life was less adapted to its environment than it is now, the struggle for life was sharper. Perfect adaptation of any form of life to the conditions surrounding it seems to check variability. Animal and plant life seem to vary more in this country than in England because the conditions of life are harder. The extremes of heat and cold, of wet and dry, are much greater. It has been found that the eggs of the English sparrow vary in form and color more in the United States than in Great Britain. Certain American shells are said to be more variable than the English. Among our own birds it has been found that the "migratory species evince a greater amount of individual variation than do non-migrating species" because they are subject to more varying conditions of food and climate. I think we may say, then, if there were no struggle for life, if uniformity of temperature and means of subsistence everywhere prevailed, there would be little or no variation and no new species would arise. The causes of variation seem to be the inequality and imperfection of things; the pressure of life is unequally distributed, and this is one of Nature's ways that accounts for much that we see about us.

2.Except in the case of certain birds of India and Australia.
3.Except in the case of certain birds of India and Australia.
4.A book published in London in 1783, entitled A Geographical, Historical, and Commercial Grammar and the Present State of the Several Kingdoms of the World, among other astonishing natural history notes, makes this statement about the white and red fox of Norway: "They have a particular way of drawing crabs ashore by dipping their tails in the water, which the crab lays hold of."
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