Raróg
Region of origin: Eastern Europe and Russia
A fiery demon or spirit, the raróg often took the form of a flaming hawk or falcon but could also appear as a dwarven creature or a whirlwind. They were believed to live at the crown of the Slavic world tree, guarding the entrance to Vyraj, a warm, vibrant paradise that was also where migratory birds went to to escape the cold winters. They are thought to share some connection to the firebird of later Russian fairy tales, a peacock-like bird with golden feathers that continued to glow brightly even after being removed.
The Compendium of Arcane Beasts and Critters 