'Sky' in the Bible

told David, "Come to me! I'll give your flesh to the birds of the sky and to the beasts of the field."

This very day the LORD will deliver you into my hand, and I'll strike you down and remove your head from you. And this very day I'll give the dead bodies of the Philistine army to the birds of the sky and to the animals of the earth, so that all the earth will know that there is a God in Israel,