Um Es Sibyan – Arabian DEMON who, as does LILITH, preysupon newborn children. Um Es Sibyan has the body of a chicken, the face of a human, and the chest of a camel. She flies through the air at night crying, “Warh, warh warh.”
The sound is a death omen to any child who hears it. Parents can ward off the demon by sounding, “Tchlok, tchlok,tchlok” until it passes by.
Source:
The encyclopedia of demons and demonology