Читать книгу: «Rambles of a Naturalist», страница 7
No. XI
It rarely happens that any of the works of nature are wholly productive of evil; and even the crows, troublesome as they are, contribute in a small degree to the good of the district they frequent. Thus, though they destroy eggs and young poultry, plunder the corn-fields, and carry off whatever may serve for food, they also rid the surface of the earth of a considerable quantity of carrion, and a vast multitude of insects and their destructive larvæ. The crows are very usefully employed when they alight upon newly-ploughed fields, and pick up great numbers of those large and long-lived worms which are so destructive to the roots of all growing vegetables; and they are scarcely less so when they follow the seine-haulers along the shores, and pick up the small fishes, which would otherwise be left to putrefy, and load the air with unpleasant vapours. Nevertheless, they become far more numerous in some parts of the country than is at all necessary to the good of the inhabitants, and whoever would devise a method of lessening their numbers suddenly, would certainly be doing a service to the community.
About a quarter of a mile above the house I lived in, on Curtis's creek, the shore was a sand-bank or bluff, twenty or thirty feet high, crowned with a dense young pine-forest to its very edge. Almost directly opposite, the shore was flat, and formed a point, extending, in the form of a broad sand-bar, for a considerable distance into the water; and, when the tide was low, this flat afforded a fine level space, to which nothing could approach in either direction without being easily seen. At a short distance from the water, a young swamp-wood of maple, gum, oaks, etc. extended back towards some higher ground. As the sun descended, and threw his last rays in one broad sheet of golden effulgence over the crystal mirror of the waters, innumerable companies of crows arrived daily, and settled on this point, for the purpose of drinking, picking up gravel, and uniting in one body prior to retiring for the night to their accustomed dormitory. The trees adjacent and all the shore would be literally blackened by these plumed marauders, while their increasing outcries, chattering, and screams, were almost deafening. It certainly seems that they derive great pleasure from their social habits; and I often amused myself by thinking the uninterrupted clatter which was kept up, as the different gangs united with the main body, was produced by the recital of the adventures they had encountered during their last marauding excursions. As the sun became entirely sunk below the horizon, the grand flock crossed to the sand-bluff on the opposite side, where they generally spent a few moments in picking up a farther supply of gravel, and then, arising in dense and ample column, they sought their habitual roost in the deep entanglements of the distant pines. This daily visit to the point, so near to my dwelling, and so accessible by means of the skiff, led me to hope that I should have considerable success in destroying them. Full of such anticipations, I loaded two guns, and proceeded in my boat to the expected place of action, previous to the arrival of the crows. My view was to have my boat somewhere about half-way between the two shores, and (as they never manifested much fear of boats) to take my chance of firing upon the main body as they were flying over my head to the opposite side of the river. Shortly after I had gained my station, the companies began to arrive, and everything went on as usual. But whether they suspected some mischief from seeing a boat so long stationary in their vicinity, or could see and distinguish the guns in the boat, I am unable to say: the fact was, however, that when they set out to fly over, they passed at an elevation which secured them from my artillery effectually, although, on ordinary occasions, they were in the habit of flying over me at a height of not more than twenty or thirty feet. I returned home without having had a shot, but resolved to try if I could not succeed better the next day. The same result followed the experiment, and when I fired at one gang, which it appeared possible to attain, the instant the gun was discharged the crows made a sort of halt, descended considerably, flying in circles, and screaming most vociferously, as if in contempt or derision. Had I been prepared for this, a few of them might have suffered for their bravado. But my second gun was in the bow of the boat, and before I could get to it the black gentry had risen to their former security. While we were sitting at tea that evening, a black came to inform me that a considerable flock of crows, which had arrived too late to join the great flock, had pitched in the young pines, not a great way from the house, and at a short distance from the road-side. We quickly had the guns in readiness, and I scarcely could restrain my impatience until it should be late enough and dark enough to give us a chance of success. Without thinking of anything but the great number of the crows, and their inability to fly to advantage in the night, my notions of the numbers we should bring home were extravagant enough, and I only regretted that we might be obliged to leave some behind. At length, led by the black boy, we sallied forth, and soon arrived in the vicinity of this temporary and unusual roost; and now the true character of the enterprise began to appear. We were to leave the road, and penetrate several hundred yards among the pines, whose proximity to each other, and the difficulty of moving between which, on account of the dead branches, has been heretofore stated. Next, we had to be careful not to alarm the crows before we were ready to act, and at the same time were to advance with cocked guns in our hands. The only way of moving forwards at all, I found to be that of turning my shoulders as much as possible to the dead branches, and breaking my way as gently as I could. At last we reached the trees upon which the crows were roosting; but as the foliage of the young pines was extremely dense, and the birds were full forty feet above the ground, it was out of the question to distinguish where the greatest number were situated. Selecting the trees which appeared by the greater darkness of their summits to be most heavily laden with our game, my companion and I pulled our triggers at the same moment. The report was followed by considerable outcries from the crows, by a heavy shower of pine twigs and leaves upon which the shot had taken effect, and a deafening roar, caused by the sudden rising on the wing of the alarmed sleepers. One crow at length fell near me, which was wounded too badly to fly or retain his perch, and as the flock had gone entirely off, with this one crow did I return, rather crest-fallen, from my grand nocturnal expedition. This crow, however, afforded me instructive employment and amusement, during the next day, in the dissection of its nerves and organs of sense; and I know not that I ever derived more pleasure from any anatomical examination, than I did from the dissection of its internal ear. The extent and convolutions of its semi-circular canals show how highly the sense of hearing is perfected in these creatures; and those who wish to be convinced of the truth of what we have stated in relation to them, may still see this identical crow skull in the Baltimore Museum, to which I presented it after finishing the dissection. At least, I saw it there a year or two since; though I little thought, when employed in examining, or even when I last saw it, that it would ever be the subject of such a reference, "in a printed book."
Not easily disheartened by preceding failures, I next resolved to try to outwit the crows, and for this purpose prepared a long line, to which a very considerable number of lateral lines were tied, having each a very small fish-hook at the end. Each of these hooks was baited with a single grain of corn, so cunningly put on, that it seemed impossible that the grain could be taken up without the hook being swallowed with it. About four o'clock, in order to be in full time, I rowed up to the sandy point, made fast my main line to a bush, and extending it toward the water, pegged it down at the other end securely in the sand. I next arranged all my baited lines, and then, covering them all nicely with sand, left nothing exposed but the bait. This done, I scattered a quantity of corn all around, to render the baits as little liable to suspicion as possible. After taking a final view of the arrangement, which seemed a very hopeful one, I pulled my boat gently homeward, to wait the event of my solicitude for the capture of the crows. As usual, they arrived in thousands, blackened the sand beach, chattered, screamed, and fluttered about in great glee, and finally sailed over the creek and away to their roost, without having left a solitary unfortunate to pay for having meddled with my baited hooks. I jumped into the skiff, and soon paid a visit to my unsuccessful snare. The corn was all gone; the very hooks were all bare; and it was evident that some other expedient must be adopted before I could hope to succeed. Had I caught but one or two alive, it was my intention to have employed them to procure the destruction of others, in a manner I shall hereafter describe.
John.
No. XII
Had I succeeded in obtaining some living crows, they were to be employed in the following manner: After having made a sort of concealment of brushwood within good gun-shot distance, the crows were to be fastened by their wings on their backs between two pegs, yet not so closely as to prevent them from fluttering or struggling. The other crows, who are always very inquisitive where their species is in any trouble, were expected to light down near the captives, and the latter would certainly seize the first that came near enough with their claws, and hold on pertinaciously. This would have produced fighting and screaming in abundance, and the whole flock might gradually be so drawn into the fray, as to allow many opportunities of discharging the guns upon them with full effect. This I have often observed – that when a quarrel or fight took place in a large flock or gang of crows (a circumstance by no means infrequent), it seemed soon to extend to the whole; and during the continuance of their anger all the usual caution of their nature appeared to be forgotten, allowing themselves at such times to be approached closely; and, regardless of men, fire-arms, or the fall of their companions, continuing their wrangling with rancorous obstinacy. A similar disposition may be produced among them by catching a large owl, and tying it with a cord of moderate length to the limb of a naked tree in a neighbourhood frequented by the crows. The owl is one of the few enemies which the crow has much reason to dread, as it robs the nests of their young, whenever they are left for the shortest time. Hence, whenever crows discover an owl in the day-time, like many other birds, they commence an attack upon it, screaming most vociferously, and bringing together all of their species within hearing. Once this clamour has fairly begun, and their passions are fully aroused, there is little danger of their being scared away, and the chance of destroying them by shooting is continued as long as the owl remains uninjured. But one such opportunity presented during my residence where crows were abundant, and this was unfortunately spoiled by the eagerness of one of the gunners, who, in his eagerness to demolish one of the crows, fixed upon some that were most busy with the owl, and killed it instead of its disturbers, which at once ended the sport. When the crows leave the roost, at early dawn, they generally fly to a naked or leafless tree in the nearest field, and there plume themselves and chatter until the day-light is sufficiently clear to show all objects with distinctness. Of this circumstance I have taken advantage several times, to get good shots at them in this way. During the day-time, having selected a spot within proper distance of the tree frequented by them in the morning, I have built with brushwood and pine-bushes a thick, close screen, behind which one or two persons might move securely without being observed. Proper openings through which to level the guns were also made, as the slightest stir or noise could not be made, at the time of action, without a risk of rendering all the preparations fruitless. The guns were all in order and loaded before going to bed, and at an hour or two before day-light we repaired quietly to the field, and stationed ourselves behind the screen, where, having mounted our guns at the loop-holes, to be in perfect readiness, we waited patiently for the day-break. Soon after the gray twilight of the dawn began to displace the darkness, the voice of one of our expected visitants would be heard from the distant forest, and shortly after a single crow would slowly sail towards the solitary tree, and settle on its very summit. Presently a few more would arrive singly, and in a little while small flocks followed. Conversation among them is at first rather limited to occasional salutations, but as the flock begins to grow numerous, it becomes general and very animated, and by this time all that may be expected on this occasion have arrived. This may be known, also, by observing one or more of them descend to the ground, and if the gunners do not now make the best of the occasion, it will soon be lost, as the whole gang will presently sail off, scattering as they go. However, we rarely waited till there was a danger of their departure, but as soon as the flock had fairly arrived, and were still crowded upon the upper parts of the tree, we pulled triggers together, aiming at the thickest of the throng. In this way, by killing and wounding them, with two or three guns, a dozen or more would be destroyed. It was of course needless to expect to find a similar opportunity in the same place for a long time afterwards, as those which escaped had too good memories to return to so disastrous a spot. By ascertaining other situations at considerable distances, we could every now and then obtain similar advantages over them.
About the years 1800-1-2-3-4, the crows were so vastly accumulated and destructive in the State of Maryland, that the government, to hasten their diminution, received their heads in payment of taxes, at the price of three cents each. The store-keepers bought them of the boys and shooters, who had no taxes to pay, at a rather lower rate, or exchanged powder and shot for them. This measure caused a great havoc to be kept up among them, and in a few years so much diminished the grievance, that the price was withdrawn. Two modes of shooting them in considerable numbers were followed, and with great success: the one, that of killing them while on the wing towards the roost; and the other, attacking them in the night, when they have been for some hours asleep. I have already mentioned the regularity with which vast flocks move from various quarters of the country to their roosting-places every afternoon, and the uniformity of the route they pursue. In cold weather, when all the small bodies of water are frozen, and they are obliged to protract their flight towards the bays or sea, their return is a work of considerable labour, especially should a strong wind blow against them: at this season, also, being rather poorly fed, they are of necessity less vigorous. Should the wind be adverse, they fly as near the earth as possible, and of this the shooters, at the time I allude to, took advantage. A large number would collect on such an afternoon, and station themselves close along the foot-way of a high bank, over which the crows were in the habit of flying; and as they were in a great degree screened from sight as the flock flew over, keeping as low as possible, because of the wind, their shots were generally very effectual. The stronger was the wind, the greater was their success. The crows that were not injured found it very difficult to rise, and those that diverged laterally only came nearer to gunners stationed in expectation of such movements. The flocks were several hours in passing over; and as there was generally a considerable interval between each company of considerable size, the last arrived, unsuspicious of what had been going on, and the shooters had time to recharge their arms. But the grand harvest of crow heads was derived from the invasion of their dormitories, which are well worthy a particular description, and should be visited by every one who wishes to form a proper idea of the number of these birds that may be accumulated in a single district. The roost is most commonly the densest pine-thicket that can be found, generally at no great distance from some river, bay, or other sheet of water, which is the last to freeze, or rarely is altogether frozen. To such a roost the crows, which are, during the day-time, scattered over perhaps more than a hundred miles of circumference, wing their way every afternoon, and arrive shortly after sunset. Endless columns pour in from various quarters, and as they arrive pitch upon their accustomed perches, crowding closely together for the benefit of the warmth and the shelter afforded by the thick foliage of the pine. The trees are literally bent by their weight, and the ground is covered for many feet in depth by their dung, which, by its gradual fermentation, must also tend to increase the warmth of the roost. Such roosts are known to be thus occupied for years, beyond the memory of individuals; and I know of one or two which the oldest residents in the quarter state to have been known to their grandfathers, and probably had been resorted to by the crows during several ages previous. There is one of great age and magnificent extent in the vicinity of Rock Creek, an arm of the Patapsco. They are sufficiently numerous on the rivers opening into the Chesapeake, and are everywhere similar in their general aspect. Wilson has signalised such a roost at no great distance from Bristol, Pa.; and I know by observation that not less than a million of crows sleep there nightly during the winter season.
To gather crow heads from the roost, a very large party was made up, proportioned to the extent of surface occupied by the dormitory. Armed with double-barrelled and duck guns, which threw a large charge of shot, the company was divided into small parties, and these took stations, selected during the day-time, so as to surround the roost as nearly as possible. A dark night was always preferred, as the crows could not, when alarmed, fly far, and the attack was delayed until full midnight. All being at their posts, the firing was commenced by those who were most advantageously posted, and followed up successively by the others, as the affrighted crows sought refuge in their vicinity. On every side the carnage then raged fiercely, and there can scarcely be conceived a more forcible idea of the horrors of a battle, than such a scene afforded. The crows screaming with fright and the pain of wounds; the loud deep roar produced by the raising of their whole number in the air; the incessant flashing and thundering of the guns; and the shouts of their eager destroyers, all produced an effect which can never be forgotten by any one who has witnessed it, nor can it well be adequately comprehended by those who have not. Blinded by the blaze of the powder, and bewildered by the thicker darkness that ensues, the crows rise and settle again at a short distance, without being able to withdraw from the field of danger, and the sanguinary work is continued until the shooters are fatigued, or the approach of day-light gives the survivors a chance of escape. Then the work of collecting the heads from the dead and wounded began, and this was a task of considerable difficulty, as the wounded used their utmost efforts to conceal and defend themselves. The bill and half the front of the skull were cut off together, and strung in sums for the tax-gatherer, and the product of the night divided according to the nature of the party formed. Sometimes the great mass of shooters were hired for the night, and received no share of scalps, having their ammunition provided by the employers: other parties were formed of friends and neighbours, who clubbed for the ammunition, and shared equally in the result.
During hard winters the crows suffer greatly, and perish in considerable numbers from hunger. When starved severely, the poor wretches will swallow bits of leather, rope, rags, in short, anything that appears to promise the slightest relief. Multitudes belonging to the Bristol roost perished during the winter of 1828-9 from this cause. All the water-courses were solidly frozen, and it was distressing to observe these starvelings every morning winging their weary way towards the shores of the sea, in hopes of food, and again toiling homewards in the afternoon, apparently scarce able to fly.
In speaking of destroying crows, we have never adverted to the use of poison, which in their case is wholly inadmissible, on this account – where crows are common, hogs generally run at large, and to poison the crows would equally poison them: the crows would die, and fall to the ground, where they would certainly be eaten by the hogs.
Crows, when caught young, learn to talk plainly, if pains be taken to repeat certain phrases to them, and they become exceedingly impudent and troublesome. Like all of their tribe, they will steal and hide silver or other bright objects, of which they can make no possible use.
John.
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