My First Experiment was as follows:—I procured a skin of our common deer, entire to the hoofs, and stuffed it carefully with dried grass until filled rather above the natural size,—suffered the whole to become perfectly dry, and as hard as leather,—took it to the middle of a large open field,—laid it down on its back with the legs up and apart, as if the animal was dead and putrid. I then retired about a hundred yards, and in the lapse of some minutes, a Vulture, coursing round the field tolerably high, espied the skin, sailed directly towards it, and alighted within a few yards of it. I ran immediately, covered by a large tree, until within about forty yards, and from that place could spy the bird with ease. He approached the skin, looked at it with apparent suspicion, jumped on it, raised his tail, and voided freely (as you well know all birds of prey in a wild state generally do before feeding),—then approaching the eyes, that were here solid globes of hard, dried, and painted clay, attacked first one and then the other, with, however, no farther advantage than that of disarranging them. This part was abandoned; the bird walked to the other extremity of the pretended animal, and there, with much exertion, tore the stitches apart, until much fodder and hay was pulled out; but no flesh could the bird find or smell; he was intent on discovering some where none existed, and, after reiterated efforts, all useless, he took flight and coursed about the field, when, suddenly wheeling round and alighting, I saw him kill a small garter snake, and swallow it in an instant. The Vulture rose again, sailed about, and passed several times quite low over the stuffed deer-skin, as if loath to abandon so good looking a prey.
Judge of my feelings when I plainly saw that the Vulture, which could not discover, through its extraordinary sense of smell, that no flesh, either fresh or putrid, existed about that skin, could at a glance see a snake, scarcely as thick as a man's finger, alive, and destitute of odour, hundreds of yards distant. I concluded that, at all events, his ocular powers were much better than his sense of smell.
Second Experiment.—I had a large dead hog hauled some distance from the house, and put into a ravine, about twenty feet deeper than the surface of the earth around it, narrow and winding much, filled with briars and high cane. In this I made the negroes conceal the hog, by binding cane over it, until I thought it would puzzle either Buzzards, Carrion Crows, or any other birds to see it, and left it for two days. This was early in the month of July, when, in this latitude, a dead body becomes putrid and extremely fetid in a short time. I saw from time to time many Vultures, in search of food, sail over the field and ravine in all directions, but none discovered the carcass, although during this time several dogs had visited it, and fed plentifully on it. I tried to go near it, but the smell was so insufferable when within thirty yards, that I abandoned it, and the remnants were entirely destroyed at last through natural decay.
I then took a young pig, put a knife through its neck, and made it bleed on the earth and grass about the same place, and having covered it closely with leaves, also watched the result. The Vultures saw the fresh blood, alighted about it, followed it down into the ravine, discovered by the blood the pig, and devoured it, when yet quite fresh, within my sight.
Not contented with these experiments, which I already thought fully conclusive, having found two young Vultures, about the size of pullets, covered yet with down, and looking more like quadrupeds than birds, I had them brought home and put into a large coop in the yard, in the view of every body, and attended to their feeding myself. I gave them a great number of Red-headed Woodpeckers and Parokeets, birds then easy to procure, as they were feeding daily on the mulberry trees in the immediate neighbourhood of my orphans.
These the young Vultures could tear to pieces by putting both feet on the body, and applying the bill with great force. So accustomed to my going towards them were they in a few days, that when I approached the cage with hands filled with game for them, they immediately began hissing and gesticulating very much like young pigeons, and putting their bills to each other, as if expecting to be fed mutually, as their parent had done.
Two weeks elapsed, black feathers made their appearance, and the down diminished. I remarked an extraordinary increase of their legs and bill, and thinking them fit for trial, I closed three sides of the cage with plank, leaving the front only with bars for them to see through,—had the cage cleaned, washed, and sanded, to remove any filth attached to it from the putrid flesh that had been in it, and turned its front immediately from the course I usually took towards it with food for them.
I approached it often barefooted, and soon perceived that if I did not accidentally make a noise, the young birds remained in their silent upright attitudes, until I shewed myself to them by turning to the front of their prison. I frequently fastened a dead squirrel or rabbit, cut open, with all the entrails hanging loosely, to a long pole, and in this situation would put it to the back part of the cage; but no hissing, no movement, was made; when, on the contrary, I presented the end of the pole thus covered over the cage, no sooner would it appear beyond the edge, than my hungry birds would jump against the bars, hiss furiously, and attempt all in their power to reach the food. This was repeatedly done with fresh and putrid substances, all very congenial to their taste.
Satisfied within myself, I dropped these trials, but fed the birds until full grown, and then turned them out into the yard of the kitchen, for the purpose of picking up whatever substances might be thrown to them. Their voracity, however, soon caused their death: young pigs were not safe if within their reach; and young ducks, turkeys, or chickens, were such a constant temptation, that the cook, unable to watch them, killed them both, to put an end to their depredations.
Whilst I had these two young vultures in confinement, an extraordinary occurrence took place respecting an old bird of the same kind, which I cannot help relating to you. This bird, sailing over the yard, whilst I was experimenting with the pole and squirrels, saw the food, and alighted on the roof of one of the outhouses; then alighted on the ground, walked directly to the cage, and attempted to reach the food within. I approached it carefully, and it hopped off a short distance; as I retired, it returned, when always the appearances of the strongest congratulations would take place from the young towards this new comer. I directed several young negroes to drive it gently towards the stable, and to try to make it go in there. This would not do; but, after a short time, I helped to drive it into that part of the gin-house where the cotton seeds are deposited, and there caught it. I easily discovered that the bird was so emaciated, that to this state of poverty only I owed my success. I put it in with the young, who both at once jumped about him, making most extraordinary gestures of welcome, whilst the old bird, quite discomfited at his confinement, lashed both with great violence with his bill. Fearing the death of the young, I took them out, and fed plentifully the old bird; his appetite had become so great through fasting, that he ate too much, and died of suffocation.