Mr. Gould, in his Birds of Australia, gives the following account of the discovery of one of these nests by Mr. Gilbert:—
“I landed beside a thicket, and had not proceeded far from the shore, ere I came to a mound of sand and shells, with a slight mixture of black soil, the base resting on a sandy beach, only a few feet above high-water mark; it was enveloped in the large yellow-blossomed Hibiscus, and was of a conical form, twenty feet in circumference at the base, and about five feet in height. On pointing it out to the native, and asking him what it was, he replied, ‘Oooregoorga Rambal,’ Jungle-fowls’ house or nest. I then scrambled up the sides of it, and, to my extreme delight, found a young bird in a hole about two feet deep; it was lying on a few dry withered leaves, and appeared only a few days old. So far I was satisfied that these mounds had some connection with the bird’s mode of incubation; but I was still sceptical as to the probability of these young birds ascending from so great a depth as the natives represented, and my suspicions were confirmed by my being unable to induce the native, in this instance, to search for the eggs, his excuse being that he knew it would be no use, as he saw no traces of the old birds having recently been there. I took the utmost care of the young bird, intending to rear it if possible; I therefore obtained a moderate-sized box, and placed in it a large portion of sand. As it fed rather freely on bruised Indian corn, I was in full hopes of succeeding; but it proved of so wild and intractable a disposition, that it would not reconcile itself to such close confinement, and effected its escape on the third day. During the period it remained in captivity, it was incessantly occupied in scratching up the sand into heaps, and the rapidity with which it threw the sand from one end of the box to the other was quite surprising for so young and small a bird, its size not being larger than that of a small quail.
“At night it was so restless, that I was constantly kept awake by the noise it made in its endeavours to escape. In scratching up the sand it only used one foot, and having grasped a handful, as it were, the sand was thrown behind it, with but little apparent exertion, and without shifting its standing position on the other leg: this habit seemed to be the result of an innate restless disposition, and a desire to use its powerful feet, and to have but little connection with its feeding; for although Indian corn was mixed with the sand, I never detected the bird in picking any of it up while thus employed.
“I continued to receive the eggs without having any opportunity of seeing them taken from the mound until the 6th of February; when, on again visiting Knocker’s Bay, I had the gratification of seeing two taken from a depth of six feet, in one of the largest mounds I had then seen. In this instance the holes ran down in an oblique direction from the centre towards the outer slope of the hillock, so that, although the eggs were six feet deep from the summit, they were only two or three feet from the side. The birds are said to lay but a single egg in each hole, and after the egg is deposited the earth is immediately thrown down lightly, until the hole is filled up; the upper part of the mound is then smoothed and rounded over. It is easily known when a Jungle-fowl has been recently excavating, from the distinct impression of its feet on the top and sides of the mound, and from the earth being so lightly thrown over, that with a slender stick the direction of the hole may readily be detected; the ease or difficulty of thrusting the stick down indicating the length of time that has elapsed since the birds’ operations. Thus far it is easy enough; but to reach the eggs requires no little exertion and perseverance. The natives dig them up with their hands alone, and only make sufficient room to admit their bodies, and to throw out the earth between their legs: by grubbing with their fingers alone, they are enabled to fellow the direction of the hole with greater certainty, which will sometimes, at a depth of several feet, turn off abruptly at right angles, its direct course being obstructed by a clump of wood, or some other impediment.”
In all probability, as Nature has adopted this mode of reproduction, she has also furnished the tender birds with the power of sustaining themselves from the earliest period; and the great size of the egg would equally lead to this conclusion, since in so large a space it is reasonable to suppose that the bird would be much more developed than is usually found in eggs of smaller dimensions. The eggs are perfectly white, of a long, oval form, three inches and three quarters long by two inches and a half in diameter.
There are several other Australian birds which adopt the same singular mode of hatching their eggs; one of these is called the Native Pheasant (Leipoa ocellata), and another the Brush Turkey (Talegalla Lathami). The latter has its head and neck covered with a naked skin, like the turkey, but the lower part of this is much thickened, warty, and bright yellow.
