For she leaves her eggs to the earth and lets them be warmed on the ground,
The ostrich is a wonderful animal, a very large bird, but it never flies. Some have called it a winged camel. God here gives an account of it, and observes, I. Something that it has in common with the peacock, that is, beautiful feathers (Job 39:13): Gavest thou proud wings unto the peacocks? so some read it. Fine feathers make proud birds.
Commenting on Job 39:13-18
Which leaveth her eggs in the earth,.... Lays them and leaves them there. Aelianus, agreeably to this, says (w), that it builds a low nest in the ground, making a hollow in the sand with its feet; though he seems to be mistaken as to the number of its eggs, which he makes to be more than eighty; more truly Leo Africanus (x), who reckons...
Yet (unlike the stork) she "leaveth," &c. Hence called by the Arabs "the impious bird." However, the fact is, she lays her eggs with great care and hatches them, as other birds do; but in hot countries the eggs do not need so constant incubation; she therefore often leaves them and sometimes forgets the place on her return.