Armor Class: 5 
Attacks: Bite (1d6)
Special: Deepvision, Fear
Move: 40 (flying)
Winged horrors are aberrations that can appear when summoned by a mage. They appear as a pitch-black orb with bat-wings. They have an open maw filled with rows of teeth. They have no discernable eyes or other features. They fly constantly, and appear to never tire. Their skin is leathery and tough, and if they are cut they bleed a green ichor. They emit a high-pitched shriek as they are attacking, but are otherwise silent.
Deepvision: Winged horrors can see in pitch blackness, including magical darkness.
Fear: Anyone who sees a winged horror must make a Saving Throw or run in panic away from the creature for 1d6 rounds.
I also have a pdf for the Winged Horror.