From the Bestiary of Pathfinder Adventure Path volume #21 comes this twisted menace, the nightmarish two-headed ruhk, as depicted by Tyler Walpole...
Beating its greasy, night-black wings, this gigantic two-headed vulture picks across the ground upon two earth sheering talons. Craning its twin massive heads forward, the terrible avian opens its giant twin beaks to unleash a blood curdling shriek.