It is a common practice in the country, to set a hen, as it is called, with ducks’ eggs; and the agony which she suffers, when she sees her young charge first take to their natural element, the water, has often been observed with sympathy. The following anecdote may be relied upon, as the circumstance was observed by a gentleman of science:—
A hen, which was employed to hatch some ducks’ eggs in the neighbourhood of a dyer’s mill, where there was a small pond, was observed to exhibit the usual symptoms of terror and alarm when the ducklings first took to the water; but by degrees she became quite reconciled to their habits, and was accustomed to enjoy herself, in great quietness, on the banks, while they gamboled in the pool. For two or three years she uniformly brought out ducklings, and at last, as regularly led them to the water as their natural dam would have done.
In the course of time, however, she brought out a brood of chickens. These she immediately led to the side of the pool also; but, on finding they did not enter the water, she became quite uneasy, invited them close to it, made every motion for them to enter it, flew over the pond, and then called them to follow, but all to no purpose. When she found that nothing would entice them to enter the water, she actually seized upon one or two of them, and threw them into it; and, if she had not been prevented, it is believed she would have drowned her whole progeny. This shews how much the native habits, even of fowls, may be changed by circumstances; and proves, in some degree, the existence of memory without judgment in the feathered tribes.
Some years ago, a farmer in the lower district of Annandale, took it into his head to rob a wild duck of her eggs, and to place them under one of his tame ducks, that was sitting at that time. The young brood (twelve in number) came into the world at the usual period, but one only continued with her stepdame. This extraordinary bird, however, never perfectly acquired the habits or dispositions of her new sisterhood: she never would associate with the tame drakes, but every spring left the farm-yard, and proceeded to the wilds in quest of mates; and, what was remarkably singular, she seemed to have a malicious pleasure in leading them into a snare, and was at great pains to draw them into such situations as admitted of their being easily shot, or otherwise destroyed. She always hatched her young in a peat moss, at some distance from the house, but never failed to bring them to the farm-yard, as soon as they were able to follow her. When this duck was about four years old, the owner was visited by a kinsman from Fife, who was so much taken up with her, that he begged for, and obtained her, as a present. She was put into a cage, and by him conveyed to his house near Kinross. She was kept in confinement for a night and a day; when, seeming perfectly contented, she was let out into the yard, where she set about adjusting herself for some time; she then suddenly took wing, and in the course of a few hours was among her old companions in Annandale. She was a second time conveyed to Fife, and her wings clipped.
She continued perfectly happy, to appearance, till her feathers grew, when she again bade her new friends farewell. She was shot in the neighbourhood of Biggar, by a gentleman, who communicated the circumstance to the owner, whose name he learned from the collar that was found about her neck, containing his name and place of abode.
Formation of the Chick in the Egg.—Scarcely has the hen sat upon the eggs twelve hours, before some lineaments of the head and body of the chick are discernible in the embryo; at the end of the second day, the heart begins to beat, but no blood is to be seen. In forty-eight hours we may distinguish two vesicles with blood, the pulsation of which is evident; one of them is the left ventricle, the other, the root of the great artery; soon after, one of the auricles of the heart is perceptible, in which pulsation may be remarked as well as in the ventricle. So early as the seventh hour, the wings may be distinguished, and on the head two globules for the brain, one for the beak, and two others for the front and hind part of the head. Towards the end of the fourth day, the two auricles, now distinctly visible, approach nearer the heart than they did before. About the fifth day the liver may be perceived; at the end of one hundred and thirty-eight hours, the lungs and stomach become visible; and in a few hours more, the intestines, veins, and upper jaw. On the seventh day, the brain begins to assume a more consistent form. One hundred and ninety hours after incubation, the beak opens, and flesh appears on the breast. In two hundred and ten, the ribs are formed, and the gall bladder is visible. The bile, in a few hours more, is seen of a green colour; and if the chick be separated from its coverings, it will be seen to move. The feathers begin to shoot towards the two hundred and fortieth hour, and at the same time the skull becomes cartilaginous; in twenty-four hours more, the eyes appear; at the two hundred and eighty-eighth, the ribs are perfected; and at the three hundred and thirty-first, the lungs, the stomach, and the breast, assume their natural appearance. On the eighteenth day of incubation, the first faint piping of the chick is heard. It then continually increases in size and in strength till it emerges from its prison.
By so many different gradations does the adorable wisdom of God conduct these creatures into life; all their progressive evolutions are arranged with order, and there are none without sufficient cause. If the liver is always formed on the fifth day, it is from the preceding state of the chick. No part of its body could appear sooner or later, without some injury to the embryo, and each of its members appears at the most convenient moment. The wise and invariable order in the production of this little body, is evidently the work of supernal power; and we shall be more convinced of it, if we consider the manner in which the chick is formed from the parts which compose the egg.
How admirable is that principle of life, the source of a new being, contained in the egg; all the parts of the animal being invisible till they become developed by warmth! What a wonderful order and regularity is observed in this amazing process,—the same evolutions taking place at once in twenty eggs! Neither does changing the position of the egg at all injure the embryo, or retard the formation of the chick; which, at the time when it breaks the shell, is found to be heavier than the whole egg was at first. These, however admirable, are far from being all the wonders displayed in the progress of incubation. The microscope, and the penetrating investigations of the curious, have only discovered what comes more immediately under the observation of our senses; whilst the discovery of many things remains for those who are to follow us, or perhaps they may never be known in this state of our existence. Much might be asked concerning the mystery connected with the formation of animal bodies, which at present is impenetrable to our researches; but let not this discourage us; let us only endeavour to improve, and make a good use of, the little knowledge we are permitted to acquire, and we shall have a sufficiency to discover at every step the wisdom and power of God, and enough to employ for the benefit of our fellow-creatures.