As soon as Hans had given the more scientific part of the natural history of the ostrich, Swartboy’s knowledge of the habits of the bird was produced, and from both were collected the details that follow.
Ostriches are gregarious—flocks of fifty may be seen upon the plains, peacefully associating with zebras, quaggas, wildebeests, blue wildebeests, and several other plain-frequenting antelopes.
The males are polygamous, and usually have from two to six wives. These lay twelve to sixteen eggs each, in a nest which is only a hole scooped out in the sand about six feet in diameter. Not more than half the eggs are deposited in the nest. The others lie scattered around, and are never hatched.
Swartboy alleged that these were intended to feed the young when they came out of the shell: but Hans dissented from this opinion. The naturalist believed that those scattered about were superfluous eggs, which were not deposited in the nest because one bird could not cover all that the whole family of hens would lay; and that once the “setting” was complete, the superfluous eggs were dropped about anywhere.
There is a good deal of probability in this conjecture of the young naturalist.
It is certain that the scattered eggs are those last laid, and that the birds continue to drop them after the incubation has commenced, but whether they form the food of the young is a disputed point. One bird can cover from thirty to forty, placed as they usually are upon their ends, and Swartboy said that he had often found this number in a nest, but more frequently thirty was the “setting.”
The male takes part in the incubation, sitting during the night; when his greater size and strength enable him the better to protect the eggs from cold. The “hens” relieve one another during the day, but when the sun is hot all leave the nest to itself, for hours at a time.
Hans stated, that in the more tropical regions the eggs are forsaken for long spells, and the hot sand and sun do the work of the parent birds; and that on this account the period of incubation is not fixed, but ranges from thirty to forty days.
The young when hatched are well developed, and in a day or two become as large as guinea-hens, leaving the nest and running about in charge of the parent birds.
At this period the old ones are very careful of their offspring. When an enemy approaches, the hen that has charge of the flock will endeavour to attract the intruder upon herself, making a feint of being wounded, spreading and drooping her wings, and tumbling from side to side along the ground, while the cock draws off the chicks in an opposite direction! Partridges, wild ducks, and many other birds, do the same.