Ballooning Spiders
THE country boy, or I might say even country baby, who does not know a spider-web when he sees it would be considered a curiosity nowadays. The morning gossamer spread in the grass or hung among the weeds and glistening in the dew—who has not seen it, and thought of the agile, long-legged proprietor somewhere lurking near by? And yet for ages, and until a comparatively recent date, this cobweb, either trailing lightly in the breeze or spread in the grass, was a mystery as to its source, and was believed to consist of dew burned by the sun. But the spider has hoodwinked even the wise heads in many other ways, and even to-day is an unsolved mystery to many of us. Yes, we all know the spider-web and the spider, but have we tried to solve the puzzle which he spreads before us by every path, in our window-blind, our office, our bedroom, or even, it may be, in mid-ocean. Here, for instance, a puzzled nautical friend propounds the question: "How do those tiny spiders get on my yacht when I am twenty miles at sea? They could not have hatched simultaneously all over the ship, and I find them by the dozens all over the sails and rigging, and even on my clothing." I have heard of a little girl who ran in-doors to her mother in great excitement to tell her that it was "snowin' 'pider-webs," a picturesque and true statement as far as it goes, but which tells but half the story, for each of the falling webs held a pretty secret. What that secret was my yachtsman can readily guess, for the two half-stories taken together complete the tale. Various accounts of these gossamer showers have been handed down in history, and were always a mystery. Even the ancient Pliny records a "rain of wool," a phenomenon which, in a greater or less degree, is to be seen by every walker in the country during the late summer and autumn months—the annual picnic of the "ballooning spiders," whose peculiar aeronautic methods are shown in my illustration.
Gilbert White, in his "History of Selborne," written over a hundred years ago, gives a most graphic account of one of these cobweb showers:
"On September the 21st, 1741," he says, "being then on a visit, and intent on field diversions, I rose before daybreak. When I came into the enclosures, I found the stubbles and clover grounds matted all over with a thick coat of cobweb, in the meshes of which a copious and heavy dew hung so plentifully that the whole face of the country seemed as it were covered with two or three setting-nets drawn one over another. When the dogs attempted to hunt, their eyes were so blinded and hoodwinked that they could not proceed, but were obliged to lie down and scrape off the encumbrances from their faces with their fore feet, so that finding my sport interrupted, I returned home musing on the oddness of the occurrence.... About nine o'clock an appearance very unusual began to demand my attention—a shower of cobwebs falling from very elevated regions, and continuing without any interruption until the close of day. These webs are not single filmy threads floating in the air in all directions, but perfect flakes or rags, some near an inch broad and five or six long, which fell with a degree of velocity that showed they were considerably heavier than the atmosphere. On every side, as the observer turned his eyes, he might behold a continual succession of fresh flakes falling into his sight, and twinkling like stars as they turned their sides to the sun."
This same shower was witnessed by others, and one observer noted a similar one from the summit of a high mountain, the sky above him to the limit of his vision glistening with the silvery flakes.
White adds, further: "Strange and superstitious as were the notions about gossamers formerly, nobody in these days doubts that they are the real production of small spiders, which swarm in the fields in fine weather in autumn, and have a power of shooting out webs from their tails, so as to render themselves buoyant and lighter than the air."
I have italicized a phrase which is most suggestive, for such is the actual resource of the spider balloonist, a feat which may be witnessed by any one at the expense of a little trouble and patience.
Almost any bright autumn or late summer day is certain to reward our search—indeed a search will hardly be necessary. The entire meadows are often draped in the glistening meshes. They festoon the grass tips, and wave their silken streamers from every mullein or other tall weed. Our garments are soon faced with a new warp and woof of glistening silk, and an occasional tickling betrays the floating fluffy mass which has encombed our hands or face. The glistening "rain of wool" of Pliny, or the mimic snow-squall of Gilbert White, I have witnessed many times, only in less degree, over the October rowen-fields. This tickling upon our hands is perhaps not all to be accounted for by the mere contact of the silky web. If we examine closely, we shall doubtless find a lively little spider extricating itself from its unsatisfactory anchorage, and creeping to the nearest available position for a new flight. Even as you are examining the web upon your hand the spry midget has mounted to the top of your finger, and is off on his new silken balloon in a twinkling, sailing upward and out of sight even while his fellow-aeronauts are falling right and left. For this flying-machine, though a toy, as it were, of the wind, is still under control of the wise little sailor at the helm.
Almost any one of these flying tufts intercepted on our finger or upon a small stick will induce its little aeronaut to make a new start, and a careful examination with a pocket magnifier will disclose his secret. No matter how slight the breeze, he seems instantly to head against it, the abdomen is then raised, and in a moment a tiny stream of flossy glistening silk is seen issuing from the spinnerets beneath. Not the ordinary single web which we all know, but a broad band which represents the many hundreds of strands usually combined in the single thread, but now permitted to issue singly from the spinnerets. White speaks of the spider "shooting out" the web, and such is the apparent feat, but doubtless the breeze assists in the operation. It is certainly taking good care of this floating banner from the loom of this little spinner upon our finger-tip. Longer and longer it grows. A yard or more of its length is soon swaying about in the breeze. So buoyant has it now become that the little spider is visibly drawn upward, and now clings barely by his tip-toes. In another second he is off on his travels, where few could follow him even if they would. But this we must do if we would see the true "balloon," with its basket and rigging and captain all in perfect sailing trim.
Up to the point of ascension—to utter a Hibernianism—I have often thus followed my balloonist, but at this point I willingly yield the pursuit to a more competent witness, one whose recognized fame as the historian of the whole spider fraternity needs no emphasis from me. They have kept very few of their secrets from the Rev. Dr. McCook. He has followed them even in their flight, and has brought back all the tricks of their navigation. To have been able to describe as an eye-witness not only the ascension, but the subsequent alert and skilful rigging, trimming of ship, sailing, reefing, and final anchoring in port of this aeronaut with the silken jib, as Dr. McCook has done, acquiring his facts through a wild pantomime in the meadows, which for a time risked his reputation for sanity, is a triumph of patient investigation which deserves conspicuous acknowledgment.
Here is what the doctor observed while his neighbors, as he ran cross-eyed over the meadow, were bewailing the loss of his reason:
"The spider, as she was raised from the perch, had her head downward. She immediately and swiftly reverses her position, clambers up her floating threads, at the same time throwing out a few filaments, which are cunningly twisted into a sort of basket into which the feet can rest. Now the upper legs grasp the lower of the ray, and the spinnerets, being released therefrom, are again set to work, and with amazing rapidity spin out a second and similar ray, which floats up behind her. Thus our aeronaut's balloon is complete, and she sits in the middle of it, drifting whither the breeze may carry her. She is not wholly at the mercy of the wind, however, for if she wishes to alight, she can gather the threads into a little white ball under her jaws; as they gradually shorten, the spider, having nothing to buoy her, sinks by her own weight, and the striking upon some elevated object, or falling upon the grass, makes her feel at home."
Having once alighted, the little pioneer immediately sets up house-keeping for herself, and the locality of its web in a year hence will doubtless be the scene of a similar balloon ascension, multiplied perhaps a thousandfold, from the neighborhood of a tuft of eggs somewhere concealed among the herbage—perhaps a brown, cocoonlike affair like that of the Argiope riparia, hung with its guy threads upon a dried fern.
The ballooning or flying spiders are not confined to any particular species. It seems to be an instinct with them all, but especially with the orb-weavers, or geometrical web-makers, and the wolf spiders; those queer short-legged specimens which dodge about upon the walls and fences, running forward or backward as the whim takes them, or even sideways in a manner at which a crab might turn green with envy. A shower of cobwebs of unusual extent fell in the vicinity of Brooklyn about ten years ago, having been especially noted by a party of surveyors in Prospect Park, among whom was a noted scientist and naturalist. The ground was covered with the webs, averaging as many as fifteen to the square foot. The shower was later noticed by the same observers upon the summit of the Brooklyn Bridge tower, and doubtless covered several miles in area.