All at once a bird makes a swift run forward, not one of those short little dainty runs—one and then another and another, with little start-stops between—that one knows so well, but a long, steady run down upon something, and at the same moment the glasses—if one is lucky and the distance not too great—reveal the object which has occasioned this, a delicate white thing floating in the air which one takes to be a thistle-down. This is secured and eaten, and we may imagine that the bird's peckings at it after it is in his possession are to disengage the seed from the down. But all at once—before you have had time to set down the glasses and make the note that the great plover (Œdicnemus Crepitans) will snap at a wandering thistle-down, and having separated the delicate little seed-sails from the seed, eat the latter, etc., etc.—a small brown moth comes into view flying low over a belt of dry bushy grass that helps, with the bracken, to edge the sandy warren, for these wastes are given over to rabbits and large landowners, and are marked "warrens" on the map. Instantly the same bird (who seems to catch sight of the moth just as you do) starts in pursuit with the same rapid run and head stretched eagerly out. He gets up to the moth and essays to catch it, pecking at it in a very peculiar way, not excitedly or wildly, but with little precise pecks, the head closely and guardedly following the moth's motions, the whole strongly suggestive of professional skill. The moth eludes him, however, and the bird stops rigidly, having apparently lost sight of it. Shortly afterwards, after it has flown some way, he sees it again and makes another swift run in pursuit, catching it up again and making his quick little pecks, but unsuccessfully, as before. Then there is the same pause, followed by the same run, then a close, near chase, and finally the moth is caught and eaten. Other moths, or other insects, now appear upon the scene, or if they do not appear—for even with the best of glasses such pin-points are mostly invisible—it is evident from the actions of the birds that they are there. Chase after chase is witnessed, all made in the same manner, with sometimes a straight-up jump into the air at the end and a snap that one seems almost to hear—a last effort, but which, judging by the bird's demeanour afterwards, fails, as last efforts usually do.
A social feeling seems to pervade these hunting-scenes, a sort of "Have you got one? I have. That bird over there's caught two" idea. This may be imaginary, still the whole scene with its various little incidents suggests it to one. The stone-curlew, therefore, besides his more ordinary food of worms, slugs, and the like—I have seen him in company with peewits, searching for worms, much as do thrushes on the lawn—is likewise a runner down and "snapper up of" such "unconsidered trifles" as moths and other insects on the wing. I had seen him chasing them, indeed, long before I knew what he was doing, for I had connected those sudden, racing runs—seen before from a long distance—with something or other on the ground, imagining a fresh object for each run. Often had I wondered, first at the eyesight of the bird, which seemed to pierce the mystery of a worm or beetle at fifty or sixty yards distance, and then at its apparent want of interest each time it got to the place where it seemed to have located it. Really it had but just lost sight of what it was pursuing, but aerial game had not occurred to me, and the tell-tale spring into the air, which would have explained all, had been absent on these occasions. I have called such leaps "last efforts," but I am not quite sure if they are always the last. More than once I have thought I have seen a stone-curlew rise into the air from running after an insect, and continue the pursuit on the wing. This is a point which I would not press, yet birds often act out of their usual habits and assume those proper to other species. I remember once towards the close of a fine afternoon, when the air was peopled by a number of minute insects, and the stone-curlews had been more than usually active in their chasings, a large flock of starlings came down upon the warrens and began to behave much as they were doing, running excitedly about in the same manner and evidently with the same object. But what interested me especially was that they frequently rose into the air, pursuing and, as I feel sure, often catching the game there, turning and twisting about like fly-catchers, though with less graceful movements. Often, too, whilst flying—fairly high—from one part of the warrens to another, they would deflect their course in order to catch an insect or two en passant. I observed this latter action first, and doubted the motive, though it was strongly suggested. After seeing the quite unmistakable fly-catcher actions I felt more assured as to the other. Yet one may watch starlings for weeks without seeing them pursue an insect in the air. Their usual manner of feeding is widely different—viz. by repeatedly probing and searching the ground with their sharp spear-like bills, as does a snipe (with which bird they will sometimes feed side by side) with his longer and more delicate one. This is well seen whilst watching them on a lawn. They do not study to find worms lying in the holes and then seize them suddenly as do thrushes and blackbirds. With them it is "blind hookey"; each time the beak is thrust down into the grass it may find something or it may not. The mandibles are all the time working against each other, evidently searching and biting at the roots of the grass, and at intervals, but generally somewhat long ones, they will be withdrawn, holding within their grasp a large, greyish grub.
Returning to the stone-curlews. During the day, as I have said, these birds are idle and lethargic—sitting about, dozing, often, or sleeping—but as the air cools and the shadows fall, they rouse into a glad activity, and coming down and spreading themselves over the wide space of the warrens, they begin to run excitedly about, raising and waving their wings, leaping into the air, and often making little flights, or rather flittings, over the ground as a part of the disport. As a part of it I say advisedly, for they do not stop and then fly, and on alighting recommence, but the flight arises out of the wild waving and running, and this is resumed, without a pause, as the bird again touches the ground. All about now over the warrens their plaintive, wailing notes are heard, notes that seem a part of the deepening gloom and sad sky; for nature's own sadness seems to speak in the voice of these birds. They swell and subside and swell again as they are caught up and repeated in different places from one bird to another, and often swell into a full chorus of several together. Deeper now fall the shadows, "light thickens," till one catches, at last, only "dreary gleams about the moorland," as now here, now there, the wings are flung up—showing the lighter coloured inner surface—till gradually, first one and then another, or by twos or threes or fours, the birds fly off into the night, wailing as they go. But this note on the wing is not the same as that uttered whilst running over the ground. The ground-note is much more drawn out, and a sort of long, wailing twitter—called the "clamour"—often precedes and leads up to the final wail. In the air it comes just as a wail without this preliminary. But it must not be supposed that all the birds perform these antics simultaneously. If they did the effect would be more striking, but it is generally only a few at a time over a wide space, or, at most, some two or three together—as by sympathy—that act so. The eye does not catch more than a few gleams—some three or four or five—of the flung-up wings at one time over the whole space. It is a gleam here and a gleam there in the deepening gloom. "Dreary gleams about the moorland"—for warren, here, purples into moor and moor saddens into warren—is, indeed, a line that exactly describes the effect.
These birds, then, stand or sit about during the day in their chosen places of assemblage, and, if not occupied in catching insects or preening themselves, they are dull and listless. But as the evening falls and the air cools, they cast off their lassitude, think of the joys of the night, there is dance and song for a little, and then forth they fly. Sad and wailing as are their notes to our ears, they are no doubt anything but so to the birds themselves, and as the accompaniment of what seems best described by the word "dance" may, perhaps, fairly be called "song." The chants of some savages whilst dancing, might sound almost as sadly to us, pitched, as they would be, in a minor key, and with little which we would call an air. Again, if one goes by the bird's probable feelings, which may not be so dissimilar to the savage's—or indeed to our own—on similar occasions "song" and "dance" seems to be a legitimate use of words.
But whatever anyone may feel inclined to call this performance—"dance" or "antics" or "display"—it varies very much in quality, being sometimes so poor that it is difficult to use words about it without seeming to exaggerate, and at other times so fine and animated, that were the birds as large as ostriches, or even as the great bustard, much would be said and written on the subject. Moreover, so many variations and novelties and little personal incidents are to be noticed on the different occasions, that any general description must want something. I will therefore give a particular one of what I witnessed one afternoon when the dancing was especially good. It was about 5.30 when I got to the edge of the bracken, which to some extent rings round the birds' place of assembly.
"A drizzling rain soon began, and this increased gradually, but not beyond a smart drizzle. The birds, as though stimulated by the drops, now began to come down from where they had been standing on the edge of the amphitheatre, and to spread all over it till there were numbers of them, and dancing of a more pronounced, or, at least, of a more violent kind than I had yet seen, commenced. Otherwise it was quite the same, but the extra degree of excitement made it much more interesting. It was, in fact, remarkable and extraordinary. Running forward with wings extended and slightly raised, a bird would suddenly fling them high up, and then, as it were, pitch about over the ground, waving and tossing them, stopping short, turning, pitching forward again, leaping into the air, descending and continuing, till, with another leap, it would make a short eccentric flight low over the ground, coming down in a sharp curve and then, at once, même jeu. I talk of their 'pitching' about, because their movements seemed at times hardly under control, and, each violent run or plunge ending, in fact, with a sudden pitch forward of the body, the wings straggling about (often pointed forward over the head) in an uncouth dislocated sort of way, the effect was as if the birds were being blown about over the ground in a violent wind. They seemed, in fact, to be crazy, and their sudden and abrupt return, after a few mad moments, to propriety and decorum, had a curious, a bizarre effect. Though having just seen them behave so, one seemed almost to doubt that they had. One bird that had come to within a moderate distance of me, made three little runs—advancing, retiring, and again advancing—all the time with wings upraised and waving, then took a short flight over the ground, describing the segment of a circle, and, on alighting, continued as before. Half-a-dozen others were gathered together under a solitary crab-apple tree—a rose in the desert—less than 100 yards off, and both with the naked eye and the glasses I observed them all thoroughly well. One of them would often run at or pursue another with these antics. I saw one that was standing quietly, caught and, as it were, covered up in a little storm of wings before it could run away and begin waving its own.
Dancing of Great Plovers in Autumn.
"This and the general behaviour of the group makes it evident that the birds are stimulated in their dance-antics by each other's presence. For these little chases were in sport, clearly, not anger. Very different is the action and demeanour of two birds about to fight. This is by far the finest display of the sort that I have yet seen, and must be due, I think, to the rain, which the birds obviously enjoyed. They had been quite dull and listless before, but as soon as it fell they spread themselves over the plateau, and the dancing began. It was not only when the birds threw up their wings and, as one may say, let themselves go, that they seemed excited. The constant quick running and stopping whilst the wings were folded appeared to me to be a part—the less excited part—of the general emotion out of which the sudden frenzies arose. There was also the usual vocal accompaniment. The wailing note went up, and was caught and repeated from one part to another at greater or lesser intervals, the whole ending in flight as before."