Harpies

Harpies are rare winged predators almost entirely unknown in the Old World. They make their lairs in the mountains and cliffs of the Land of Chill but always near the sea, where prey is more readily available. Their wings are leathery, resembling those of a bat, though their forms often sprout black feathers. Their lower bodies end in scale-covered bird’s legs and jagged talons. It is their torsos that likely cause such speculation about Harpies, for they have the upper body of a voluptuous female, though with a savage and feral beauty. Their appearance has lead to many arguments among scholars; some concluding that they are little more than mere beasts, others that they are touched by Chaos. Harpies will frequently try to attack from surprise and in large numbers. They put their wings to good advantage, using hit and run tactics on land bound foes. They will swiftly retreat to a high location where they cannot be readily followed if injured.

Source

 * Warhammer Fantasy RPG 2nd ED -- Old World Bestiary (pg. 99).