Aarakocra

Denizens of the open skies, long ago the Aarakocra roamed the clouds of the Sky Kingdom in great flocks. Vindur, Thunder King, launched a campaign of conquest that bound them all to his will. After that he mostly lost interest, but the balance of power is still made clear whenever necessary. They still fly across the skies but must now obey any Knights of Terranimbus in their path. Little remains of their glorious civilization, but the flocks are still friendly to groundlings who find their way to the clouds.