Part 5
All along its under-water front the obscure under-water weeds grow up and die year after year, generation after generation, forming fertile banks of beautiful soft mud, into whose lower depths the great thick rootstocks of the pond-lilies push, and in which the fibrous roots of the tape grass, the fresh-water eel grass, find a hold. The growth and decay of these, with the water shield, with its jelly-protected foliage, the yellow dog-lily, and in lesser depths the bulrush, add to the growing bank as coral insects grow and die in tropic seas, until it is near enough to the surface for the pickerel weed to find roothold. Then indeed the bog steps forward with vigor, for the pickerel weed is its firing line. All summer you shall see its blue banners flaunting gayly in the southern breezes, tempting the land-loving bumble-bee to sea, calling the honey-bee from the mile-distant hive, and offering rest and luncheon to a myriad lesser insects, all with genial hospitality. Its serried millions in close ranks breast the waves in a broad blue line from one end of the bog to the other, a half-mile or so.
Behind these are shallow pools, where again you find the white water-lilies. Here they bloom in enormous profusion from late June until early September, reaching their grand climax during late July. On such a day, standing in the boat at the southerly end of the bog, counting those within a given space and multiplying, I estimated that there were ten thousand of the fragrant white blooms in sight. Twice as many more were hidden by bulrush and pickerel weed. On Sundays and holidays boatloads of trolley trippers paddle and push among them and carry them off by the hundred, yet they make no mark on the visible supply. The decay of the leaves and stems of these add to the under-water foothold of the bog, but after all it must be the reedy stems, sagittate leaves, and interwoven roots of the pickerel weed that are its main foundation.
Steadily seaward over the foundation thus laid progresses the long, definite front of the saw-edged marsh grass. Once it interlocks its roots along the mud surface formed for it, it leaves no room for the freer-growing denizens of the shallows. In among the marsh grass grows no flaunting flag of pickerel weed, no pure white nymphæa sends forth its rich odor.
Only the bog cranberry may hold its own in any quantity against the throttling squeeze of those grass roots. Where these grow is the high sea of the bog, its waves rising and falling in the free winds. Yet, just as pickerel weed and water-lily give way before the advance of the marsh grass, so it in turn falls on the landward side before the advancing hosts of the swamp.
A steady phalanx of swamp cedars pushes its foothold farther and farther out upon it, year by year, scouting with button bush and black alder and holding every inch that they obtain for it. Now and then something happens to a brief area of marsh grass and cranberries so that their dense packed minions faint and release their root grip on the quaking mud. Every such opening is seized by the alder or the button bush, and the cedars follow them; indeed, sometimes the cedars, favored by the right wind or the right bird carriers at seeding time, slip in first, and little island clumps of their dark bronze green stand here and there over against the cadet blue of Blue Hill which hangs like a beautiful drop-curtain always on the westerly sky.
Once, a half-century ago or more, a farmer and his men came down from the pastures, and for purposes of their own cut a ditch straight through the middle of the bog to the open water. The hundreds of scrawny night herons, sitting on pale blue eggs in scraggly nests in the cedar swamp must have heard the cedars laugh as this went on. It was the swamp’s opportunity. Where the farmer and his men with incredible labor cut and tore away the marsh-grass roots the cedars planted their seeds, and called upon the alders and the swamp maples and the thoroughwort, the Joe Pye weed, and a host of other good citizens of the swamp, to help them.
So vigorous was the sortie and so well did they hold their ground that you may trace the farmer’s wide ditch to-day only as a causeway down which the swamp has come to build a great wooded area in the midst of the bog, accomplishing in half a century what it might not have done in five times that had it not been for human aid. Thus, slowly as you and I count time, only an inch or two a year perhaps, yet all too rapidly for the joy of future generations, the bog encroaches upon the pond and the swamp follows towards complete possession, which as the centuries go by will make the quaking sphagnum firm meadow land.
For all you and I know, the Metropolitan Park Commission of the year 3908 will be fixing up a second Franklin Field here for the camping ground of visiting Pythians. Meanwhile let us hasten to enjoy our bog and its reedy borders.
It is the home and the occasional resting place of many a wild free creature. Of a clear midsummer evening you may hear the muskrat grubbing roots there, see, perhaps, the moonlight glint on the long V-shaped ripple which he makes as he swims, and hear his snort and splash when he dives at sudden sight of you. You may chance upon a disconsolate bittern sitting clumsily in dumpy patience as he waits for food to splash up to him, and you may even hear him work his wheezy, dislocated wooden pump, a cry as awkward and disconsolate as the bird.
The muskrats breed in the bog, the bittern had his grassy nest there, and a myriad blackbirds have made the low bushes vocal with their cheery whistles all summer. They are flocking now, getting the young birds in training for the long flight south, but they still hang about the bog and they still whistle merrily. Surely it is not environment that makes temperament. Bittern and blackbird both frequent bogs, yet the bittern is a lonely misanthrope, whom I more than half suspect of being melancholy mad, while the blackbird is as cheery and as fond of his fellows as a candidate. When you hear his whistle you half expect him to light on a thwart, hand you a cigar, and ask after the baby. But the blackbird’s election is sure anyway.
Another loved and lovely denizen of these bogs is the wood duck. These breed in the swamp, the mother bird building a grassy nest in a hollow tree, where she lays from eight to fourteen buff-white eggs, and leads her yellow fluffy ducklings to a nearby secluded pool for their first swim. Later they come out into the bog, and ultimately make the pond, where they learn to forage for themselves. By the first of August the mother bird has sent them adrift, in the main, to paddle and flap their way about as best they may. They are “flappers,” as the boys call them. That is, they can make good speed along the surface by half running and flapping vigorously, but they cannot yet fly enough to rise into the air.
One of these young wood ducks came out of the bog the other morning, just at the gray of dawn, and swam over toward the boat landing. He was quite near the shore when I took ship and rowed to seaward of him, thus shutting him off from the open pond and from the bog. Then for an hour or two followed what was to me the most interesting duck hunting I have done for a long time. I could row as fast as he could swim, and I continually edged him along the south shore, getting nearer every minute. I have read much of the marvelous intelligence of wild creatures. Yet I saw little of it in this chase. The duck knew me for an enemy, on general principles, for I was a man, and I was evidently coming after him. Even rudimentary intelligence should have told him to flap for the bog as fast as he could. He did nothing of the sort. He just edged along down the shore, evidently hoping that I was light-minded, and would forget all about him in a minute or two if let alone. But I kept at it until I was so near I could see every one of his already handsome feathers and note the coloring of those parts which had not yet reached the beauty of maturity. I could see the yellow rim of his eye, and still he swam east and swam west but made no real move to escape.
Two things I wished to learn from my wood duck. One was how much general intelligence and real quickness of wit he would show in escaping. The other was how he carried his wings under water if, by any fortunate chance, I should be able to see him swim after he went down to escape me. But at first he was so irresolute that he neither dived nor made any vigorous attempt to escape. I got so near, that to avoid driving him up the bank into the woods I had to ease away a bit. Finally, at my second approach, he did try to flap by the end of the boat, but I spurted and headed him off.
It was a long time, and it took much manœuvring to make him dive, but it finally entered his head that he might avoid being cornered and badgered by going under water. This he did, going on a slant just a very little below the surface, probably because he was in too shallow water to go much deeper, and coming up well to seaward. There he preened his feathers, took a sip or two of water and, seemingly, waited to be surrounded a second time.
I rowed out, got on the off-shore side of him, and again began boating him in toward the shore. He showed less uneasiness this time, but dived and swam out again after considerable more pressing. Again and again I repeated this, sometimes getting no sight of him under water, again seeing him move along very plainly. At no time did I notice any motion of the wings under water. I have been told that wild ducks when swimming beneath the surface make most of their progress with their wings, quite literally flying under water. This may be, but I have no evidence of it in the under-water action of this one.
Again, it has been sagely impressed upon me by old duck hunters that you could tell in what direction from your boat a bird would rise by noting the way in which his bill pointed when he went under. I think it was Adirondack Murray in that famous loon-hunting chapter who first made the point, and it has been insisted upon by many another successor. But, bless you, my half-grown wood duck made no difficulty of going down with his head toward the morning and coming up in the sunset portion of the view. He took slants under water and cut semicircles at will. But I couldn’t see him use his wings while beneath the wave.
Little by little he got over being excited by my presence. He began to eat bugs off the lily pads as he went by, and now and then tip up for an under-water search. Thus we coquetted with one another all along the southern shore of the pond, and when I finally cornered him for a last time in behind Loon Island he dove without embarrassment and began his feeding as soon as he had again reached the surface. The chase was no longer exciting, and I turned my attention to something else. Then he swam out quite a little further into the pond, preened his feathers carefully, tucked his head under his wing and went to sleep!
Evidently he had decided that I was eccentric, but harmless, and the best way to escape my attentions would be to leave me severely alone.
And there you have it. I think the wood duck is beautiful, but not very bright. Yet it occurs to me that some Sherlock Holmes of the woods may prove, to the satisfaction of Dr. Watson anyway, that he is preternaturally clever, in that this one, though still young, was keen enough to see that from the first I had no evil intentions toward him.
SOME BUTTERFLY FRIENDS
SOME BUTTERFLY FRIENDS
At dusk all the edges of the pond are lighted with the white candles of the clethra. Its fragrance has in it that fine essence which goes to the making of the nectar and ambrosia of the gods. He who would sup with them may do so by taking canoe of an early August twilight when the purple arras of the coves glow softly golden with the reflected light of the sunset’s afterglow. Then the coarser air seems to have let the light slip from between its clumsy particles, leaving its more ethereal essence still clinging to a more subtle interatomic fluid.
The fragrance of the clethra seems always to me as fine as this spirit of light in the ambrosial twilight of the ripened summer. It is no air-borne delight like the resinous scent of the forest pines or the pasture sweet-fern when the hot sun of midday distills them and the hot wind of midday sends them far to you across the quivering fields. It is something finer, softer, more silkily subtle, which, like the rose gold of the afterglow of the sunset, tints the dusk of the cove between the air atoms, not by way of them.
Then, as the gold glimmers and fades and the pink faints in the cooling purple of the dusk, and the outline of the cove shore slips from the front of your eye to the chambers of memory behind it, so that you else might see it best with the eyes shut, the white candles are lighted and the eager moth sees by them to sup with you and me and the gods on this essence of ambrosia, to tipple on this spirit of nectar which the night reserves for those that love it.
I do not know why the clethra which gleams so white in the dusk should need anything more than its own white beauty to call the moth to its wooing. Perhaps it does not need more. Perhaps all this fine fragrance is but the overflow of its soul’s delight at being young and chastely beautiful, and trembling in the ultra violet darkness on that delicious verge of life that waits the wooer. I half fancy that this is true of all perfume of flowers, that it is less a call to butterfly or bee to come to their winning than it is a radiation of delight from their own pure hearts at the dawning of the full joy of living. I am not always willing to take the word of the scientific investigator on these points as final. The scientists of the not very remote past have known so much that is not so!
It is possible that, just as a hunting-dog picks up a scent that is strong in his nostrils and has no power in ours, so the flowers that we call scentless send out an odor too faintly fine for our senses, yet one that the antennæ of moth or bee may entangle as it passes and hold for a certain clue. Perhaps the scents that are only faint to us carry far for the butterfly, but if so, and if flower perfumes are made only for the calling of insects, why need they be made so intoxicating to the human senses? The scent of carnations is as pleasing to the soul as a strain of beautiful music, and equally arouses high aspirations and noble longings. So to me the odor of the clethra at nightfall is a tenuous thread of ethereality that reaches far toward a realm of spiritual ideals. It ought to go with a ritual and a vested choir.
I do not find the odor of the pasture milkweed speaking thus to any inner sense. It is just a gentle, lovable, stay-at-home smell that surely does not float farther than the pasture bars. Yet of all the plants that have bloomed within my world of garden and pasture this summer it has been by far the most popular among insects. It is not that it is the most attractive to the eye, in any of its forms, for there are many flowers of colors more vivid and to be seen farther, as well as of much stronger scent. Yet all day long you will find it besieged by bees, from the aristocratic Italian worker from the farmer’s best hive down to those scallawag bees that make no honey for themselves but lead a vagabond life and lay their eggs in other bees’ nests, leaving their young to grow up in unendowed orphan asylums.
Many varieties of ants seek the milkweed blooms, and you shall find about a large clump more sorts of wasps than you would believe existed, yet it is the butterflies who most of all make it their rallying place. Every butterfly in the whole region makes it his business to know each large clump of milkweed, and to make the rounds at least daily.
There, if you watch, you may see the pretty little pearl crescent, whose range is from Labrador to Texas. The shy meadow browns flit out from the shadow of the brook alders and feed for a moment before they take fright at the fact that they are out in society and flit desperately back again. The angle wings flip about like animated question-marks, and fulvous fritillaries soar sedately, now and then lighting to feed and fold their wings that you may see the big silver spots of the under parts. And so you might name them all, almost every butterfly of early August, all besieging the milkweed so eagerly that you may hardly drive them away.
The fact is they come neither for scent nor sight; they come for good taste--which they find in the honey glands of the peculiarly shaped bloom, which are obvious and sticky and within reach of all. I do not think it is half so much the odor of the flower which draws them, be it never so sweet or so strong, but memory of the honey dew sipped there yesterday or last week. No doubt the love of the milkweed bloom is an inherited tendency, also, bred in the bones from a line of milkweed-frequenting ancestors infinitely long.
Indeed, one of our most splendid butterflies is the _Anosia plexippus_, otherwise known as the milkweed butterfly, rightly named also the monarch. Every boy who knows the country in summer knows him by his rich, red coloration, his strong, black-bordered wings with their black veins. Every bird knows him too and lets him alone. On the first median nervule of the hind wings of the butterfly is a scent bag whence he dispenses an odor so disagreeable to the bird who would eat him that he goes free, and is not afterward troubled.
Along with the monarch sipping honey with eager industry from the meadow milkweed, you will often see the viceroy, who, as a viceroy should, closely imitates, but does not equal, the monarch. He has neither the monarch’s vigor of flight nor his means of defence from predatory birds, but his safety--so the students tell us--lies in looking so much like his superior that he also is let alone. The students go on to say that his is a good example of the imitative power of insects whereby they escape destruction by seeming to the casual eye to be something else.
The viceroy, which is a _Basilarchia disippus_, thus looks not the least like other members of his family, but consciously mimics the coloring of the monarch for safety. Thus many tropical beetles contrive to look like wasps that they may not be molested, and some insects look like brown leaves and others like green ones.
But do they contrive, imitate, mimic? It is no doubt true that because of the resemblance they escape, but to say that they imitate or contrive or mimic seems to me to be to assume a knowledge of the workings of the inner consciousness of an insect that not even the most careful student can have. I am more inclined to believe that the so-called mimics are fortunate in an accidental resemblance and so escape the destruction of their species which has fallen upon many a less fortunate type.
Yet no butterfly, however exquisite his coloring, or however strong and graceful his flight, twangs with his fluttering wings the fine heartstrings of romance as does the monarch. The first one that came dancing down the sunlight to the sweet rocket in bloom in my garden this spring brought to me a spicy odor of tropic isles. The beating of his wings shed, as he passed, faint fragrance of Mexican jasmine, and I thought I saw slip from them the infinitesimal dust of the pollen of stephanotis lately blooming in the glades of Panama. Three months before he floated serenely beneath my cherry tree he may well have soared through the tropic glades where crumble the ruins of the palaces of the Incas.
His flight, seemingly as frail as that of a red autumn leaf sliding down the October zephyr to carpet the nearby field with rustling fragrance, has matched that of that rifle-ball of bird life, the ruby-throated humming-bird. Together they sip the sweets of my sweet rocket in the spring. Together they wing their way south to the region of perpetual summer when the winds of late September promise frost. Sometimes in this annual flight the monarchs pass the sandy stretches of the New Jersey coast in swarms that, stopping at nightfall for rest, refoliate with their folded wings the shrubs left bare by the autumn gales.
It may be that, like the birds, the knowledge of the route they must follow is bred in the marrow of their butterfly bones by the constant use of a million generations. It may be that they simply drift away from the cool wind from the North toward the Southern sun that shines so serenely in the bright autumn days. But whether through the guiding hand of Providence, or inherited wisdom, or a fortunate tact that acting from day to day produces the happy result, this Southern movement in winter is the sole salvation of the species here in the North.
If they did not make these long flights we should have no Anosias with us each summer, for unlike other butterflies the frost kills them in whatever form they remain to brave it. All summer long their long, red wings bear them bravely from one clump of milkweed to another. They sip the honey which each floret of the umbels holds forth, the sticky mass the size of a pinhead. They lay their eggs upon its leaves and the black and yellow caterpillars hatch and feed there. Then they hang in a green and gold chrysalis from a nearby twig till the imago, the perfect butterfly, bursts its bonds and sails away to find more milkweed. There may be several broods of a summer, but the frost stops all that. The monarch may not winter here, nor may his eggs or chrysalids survive the cold.
Many butterflies, frail though they seem, do pass the New England winter successfully. The _Antiopa vanessa_, otherwise known as mourning-cloak or Camberwell beauty, a handsome brown fellow with blue spots and a pale-yellow margin, well known to every one, flits joyously through the woods with the very first warm days of spring. He has been snugged up in some dry crevice, numbed and torpid, but very much alive, all winter. The first genial warmth sets him free, and later I always find his children browsing on the willow twigs over in the cove. They are rough chaps, horrid with bristling black spines and with dull red spots relieving their otherwise plain black hides. But they grow fast, and by and by go out upon a twig and hang themselves, head down, by a little silken rope, swinging there in the wind, simply a dead caterpillar that has imitated Judas.
One day the caterpillar part sloughs off. It is a fairly sudden process. You may paddle by the willows in the morning and see all your little Judases hanging in a row. Paddle back at noon and their skins have shrivelled and slipped off, and you have chrysalids, queer, impish-looking things, swinging there still, head down. You know they are alive; indeed, if you poke them they will wiggle impatiently, but they swing in the wind and give no other sign for a week or ten days. Then they cast a second skin, and pop out full-grown butterflies that stretch their wings for a time leisurely, then suddenly dash into the air and go off over the hill like mad. The whole thing is so sudden! The change, when it does come, is as if some woodland magician had waved a willow wand and said “Abra-ca-dabra; presto, change!” Time and again I have watched to see that caterpillar skin fall off, and again to see the vanessa step forth from the domino in which it has been masquerading, but they have always been too quick for me.