Adam Clarke on Job 39:14

Which leaveth her eggs in the earth - This want of parental affection in the ostrich is almost universally acknowledged. Mr. Jackson, in his Account of Morocco, observes: "The ostrich, having laid her eggs, goes away, forgetting or forsaking them: and if some other ostrich discover them, she hatches them as if they were her own, forgetting probably whether they are or are not; so deficient is the recollection of this bird." This illustrates Job 39:15 : "And forgetteth that the foot may crush them, or that the wild beast may break them." The poet seems well acquainted with every part of the subject on which he writes; and facts incontestable confirm all he says. For farther illustration, see the account from Dr. Shaw at the end of the chapter, Job 39:30 (note).