Foulwing

Foulwings were huge, monstrous aberrations.

Description
They were very large with black, leathery wings, toad-like bodies, and horse-like heads. Their skin was black and covered in "horn-shaped, wriggling skin growths." They were clumsy fliers. Their most distinctive feature was their three jaws filled with razor-sharp teeth and centered around a single snout. Their eyes glowed red in infravision.

Behavior
Foulwings were generally considered to be lazy creatures.

Foulwings communicated with each other through animal-like grunts and calls.

Combat
Foulwings preferred to use their weight to pin prey or enemies under their bodies. They had the ability to breathe out ammonia, causing irritation to the eyes and nose of their targets. They used their sharp teeth to pierce the flesh of a target and suck its blood.

Ecology
These creatures often lived solitarily, but occasionally they could be found in flocks of up to four creatures.

Diet
Foulwings were a carnivorous species. They were known to hunt live prey and sometimes kept creatures captive for food, but their preferred food was carrion.

Habitat
Foulwings were believed to have originated on a different plane, but it was not known which plane. They could be found in any environment, but were found most frequently in the Underdark.

Relationships
Foulwings were sometimes used as mounts by evil humanoids, such as drow. Foulwings guarded House Mizzrym in Menzoberranzan. Some of the house's members, including Pharaun Mizzrym, were able to ride them.

Foulwings sometimes mated with wyverns, creating a type of hybrid creature known as a foulvern.

Usages
Foulwing flesh was unappetizing as meat, but their saliva and blood made a good caustic cleaner for metal items.

Notable foulwings

 * Zvopua, "fouldrake" (half-black dragon advanced foulwing) mount to Eregul.