Sithspawn erathyrs

Sithspawn erathyrs are the hunched pale avian creatures that feed on the blood of Force-sensatives. They resemble much larger and darker forms of a shyrack, but are very much different to their original species, erathyrs.

Biology
The Sithspawn erathyrs are the foul creation of the Dark Lord Evxa-Uun's alchemists by mutalating the peacful erathyrs into violent blood-sucking batlike monsters. The Sithspawn erathyrs have large leathery wings that stretch to thirty centimetres and vegistal horns tipped with poison. Their fangs can puncture armour and their limbs are capable of snatching up Jedi prey and feeding on them.

History
When Exva-Uun died, his servants let loose thousands of Sithspawn erathyrs to guard his tomb, along with many terentatek and the Sithspawn erathyr/human hybrid, Ekkraxnar.