In the Qur'an, Allah calls us to give attention to birds with His verse, "Do they not observe the birds above them, spreading their wings and folding them in? None can uphold them except (Allah) Most Gracious. Verily, He is the all-Seer of everything (Surat al-Mulk: 19)." Herewith, we will particularly review migratory birds; we will describe how perfect balances they establish travelling in the skies and the systems their bodies are endowed with, and focus on the wonder of Allah's upholding them "in the sky."