Orators are the Scylla adaptation of the Overseer strain.
The mutation gives it the ability to detect cloaked and burrowed units, along with an increased sight range.
Although Orators still fly using helium-filled gas sacs combined with a weak telekinetic psi-ability for lift and motive power, they are faster than Keepers due to the evolution of a pneumatized carapace.
The Orator's sight radius expands when it stays still and shrinks when it moves. However, the detection radius does not increase. The Orator can create a small patch of Creep through an activated anatomical process, the radius steadily expanding with time, during which the Orator must remain stationary.