From The Regnum Animale by Bishop Vitellus of Oaken:
Avians may be found throughout Mammalian lands, though their homelands lay across the sea to the East. The gift of the Avians is flight, for most every Avian (though I am told not all) possesses a set of wings as well as arms and legs. They are also unlike us in that their children are hatched from eggs. While Avians have demonstrated strength and courage as great as that of Mammalia, they are primarily known for their keen intellect and cunning mastery of the arts of magic and courtly intrigues.