They have different kinds of wings, and various characteristics. They are controlled by the rein of (Allāh’s) authority. They flutter with their wings in the expanse of the vast firmament and the open atmosphere. He brought them into existence from nonexistence in strange external shapes, and composed them with joints and bones covered with flesh. He prevented some of them from flying easily in the sky because of their heavy bodies and allowed them to use their wings only close to the ground.