The Viidaav were a race of green-skinned humanoids native to the planet Viidaav. The Viidaav were adapted to living in the arid environment of their homeworld, having long, thin limbs and a series of heat-dissipating plates lining their skulls.
During the build-up to the Clone Wars, the Viidaav agreed to join the Confederacy of Independent Systems, and allowed the Separatists to establish a base of operations on their homeworld. They were unaware that Count Dooku was planning to use the Viidaav base as the lure in a trap to destroy a contingent of Old Republic troops. The trap involved the detonation of several massive bombs, and their explosion would have rendered large portions of the planet's surface unlivable. When they learned of the plan, several Viidaav soldiers sacrificed themselves in order to disable the trap and save their homeworld.