The species known as Ravna were a sentient species of vampiric beings, notable for their capacity to spread their condition, converting others into beings like themselves.
This bat-resembling species possessed the unique ability to convert other living beings into creatures of their kind by inflicting scratches upon them. Individuals with a strong connection to the Force, such as Count Dooku, demonstrated a resistance to this transformation, delaying the effects for a time. Both the original Ravna and those they created could also draw in various forms of energy through their mouths, including energy emitted from blaster bolts and lightsabers.