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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 phoebe-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 Phoebe 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 thrushes 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.

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