The Air Caste of the Tau traditionally functioned as messengers, but now fill the ranks of the Tau Navy (Kor'vattra), working as pilots and starship crews. The Air Caste lives almost entirely off-world, and as such have developed long, slender limbs, but possess a skeletal and muscular structure of reduced strength. Prior to the unification of the Tau castes, the Air caste were said to possess membranous wings, allowing them to glide on warm air currents.

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