The cry is said to be hoarse and mournful, resembling the roar of a lion or {29}the lowing of an ox; but Ostriches are, as a rule, decidedly silent. In a state of nature the food consists chiefly of herbage, including seeds and fruits; in captivity the diet is of every description, and even in a wild condition small mammals, birds, reptiles, and insects are eaten, with a quantity of grit to aid digestion. In confinement the birds become very tame, and will then swallow bones, nails, and the like–in fact almost anything they can pick up. They can exist for a long time without water, but drink regularly when opportunity offers; they show a liking for salt, and will bathe in the sea or in rivers, immersed up to the neck. The hens belonging to one cock lay in the same nest, which is a fairly shallow excavation dug in sand or dry soil, and surrounded by the material thrown out during the process, or more rarely by an edging of grass. The spot is hard to discover in the desert, the stride being too long for tracks to be of much assistance. More than thirty yellowish-white eggs are sometimes deposited within the pit in circular arrangement, and many more are dropped around, to serve, it is asserted, for food for the newly-hatched young; in the wild state, however, the average number is probably less. The contents, equal to those of some two dozen hens' eggs, are used for food by the natives, the shells forming convenient pots for water and so forth. The cock undertakes almost the whole duty of incubation, being occasionally relieved by the hens during the daytime;[17] but when the sun is hot no brooding is necessary, though a covering of sand is superposed to guard the spot from the depredations of marauders. The chicks, which run from the shell, are hatched in six or seven weeks, and are accompanied by both parents, the male often counterfeiting wounds to draw away the intruder, circling around with drooping wings or throwing himself down as if in extremities.