Ixxvi INTRODUCTION. 
mounds, only these two contained egys; we were too early; a week later and we should doubtless have 
found many more. To give you an idea of the place this bird chooses for its remarkable mode of rearimg its 
young, I will describe it as nearly as 1 can:—The Wongan Hills are about thirteen hundred feet above the 
level of the sea, in a north-north-east direction from Drummond's house in the Toodyay ; their sides are thickly 
clothed with a dense forest of Eucalypti; and at their base is a thicket, extending for several miles, of upright- 
growing and thick, bushy plants, so high in most parts that we could not sce over their tops, and so dense, that 
if we separated only for a few yards, we were obliged to cooey, to prevent our straying from each other ; 
this thicket is again shadowed by a very curious species of dwarf Eucalyptus bearing yellow blossoms and growing 
from fifteen to thirty fect in height, known to the natives as the spear-wood, and of which they make their spears, 
digging sticks, dowaks, &c.; the whole formation is a fine reddish ironstone gravel, and this the Leipoa scratches 
up from several yards around, and thus forms its mound, to be afterwards converted into a hot-bed for the 
reproduction of its offspring. The interior of the mounds is composed of the finer particles of the gravel mixed 
with vegetable matter, the fermentation of which produces a warmth sufficient for the purpose of hatching. Mr, 
Drummond, who had beer for years accustomed to hot-beds in England, gave it as his opinion that the heat 
around the eggs was about 80°. In both the nests with eggs the White Ant was very numerous, making its little 
covered galleries of earth around and attached to the shell, thus showing a beautiful provision of Nature in 
preparing the necessary tender food for the young bird when emerging from the shell; one of the eggs I have 
preserved shows the White Ant’s tracks most beautifully ; the largest mound I saw, and which appeared as if in a 
state of preparation for eggs, measured forty-five feet in circumference, and if rounded in proportion on the top 
would have been full five feet in height. I remarked in all the nests not ready for the reception of eggs the inside 
or vegetable portion was always wet and cold, and [ imagine, from the state of others, that the bird turns out the 
whole of the materials to dry before depositing its eggs and covering them up with the soil: m both cases where I 
found exes the upper part of the mound was perfectly and smoothly rounded over, so that any one passing it 
without knowing the singular habit of the bird might yery readily suppose it to be an ant-hill: mounds in this 
state always contain eggs within, while those without eggs are not only nof rounded over, but haye the centres so 
scooped out that they form a hollow. The eggs are deposited in a very different manner from those of the 
Megapodius ; instead of each being placed in a separate excavation in different parts of the mound, they are laid 
directly in the centre, all at the same depth, separated only by about three inches of earth, and so placed as to 
form a circle. I regret we were so early; had we been a week later, the probability is 1 should have found the circle 
of eggs complete. Is it not singular that all the eggs were equally fresh, as if their development was arrested 
until the full number was deposited, so that the young might all appear about the same time ? No one considering 
the immense size of the ex can for a momeut suppose the bird capable of laying more than one without at least 
the intermission of a day, and perhaps even more. The average weight of the egg is eight ounces, and four of 
them on being blown yielded nearly a pint and a half, Like those of the Megapodius, they are covered with an 
epidermis-like cvating, and are certainly as large, being three inches and three quarters in length, by two and a 
half in breadth ; they vary in colour from a very light brown to a light salmon. During the whole day we did not: 
succeed in obtaining sight. of the bird, although we saw numerous tracks of ifs feet, and many places where it had 
been scratching ; we also saw its tracks on the sand when crossing the dried beds of the swamps at least two miles 
from the breeding thicket, which proves that the bird, in procuring its food, does not confine itself to the brushes 
around its nest, but merely resorts to them for the purpose of ineubating. The native informed us that the only 
chance of procuring the bird was by stationing ourselves in sight of the mound at a little distance, and remaining 
quiet and immoyeable till it made its appearance at sun-down ; this I attempted, and, with the native, encamped 
within twenty yards of the mound about an hour before sunset, taking the precaution to conceal ourselves well 
with bushes from the quick eye of the bird, but leaving just a sulficient opening to get a fair sight with my gun; 
in a half-sitting, half-crouching position I thus remained in breathless anxiety for the approach of the bird I had so 
lone wished to see, not daring to move a muscle, for fear of moving a branch or making a noise by crushing a dead 
leaf, till I was so cramped I conld seareely bear the pain in my limbs; the bird did not however make its 
appearance, and the native, with the fear of wading through the thicket in darkness (for there was no moon), 
became so impatient, that he started wp and began to talk so loud and make so much noise, that 1 was compelled to 
give up all hopes of seeing the bird that night; however, just as we were passing the mound we started the bird 
