The harpies of Drygulch Ravine are not gathered under any leader's wing. Thus, they have taken to banditry, stealing supplies from caravans and hoarding them on their high cliffs. The harpies nest further in, in Razorwind Canyon, where the most powerful harpies guard their eggs.
Centaur warbands have assumed control of the canyon in western Durotar. The violent creatures use the many twists and folds within the canyon to hide from Horde patrols in between their periodic raids.