כִּֽי־תַעֲזֹ֣ב לָאָ֣רֶץ בֵּצֶ֑יהָ וְֽעַל־עָפָ֥ר תְּחַמֵּֽם׃
For she leaveth her eggs on the earth, And warmeth them in dust,
Rashi on Job
For she leaves her eggs on the ground and she goes and warms herself on the dust at a distance.
Malbim on Job
Storks can fly and nest high-up, safe from predators; ostriches cannot.