The following section contains information from a previous version of StarCraft II: Heart of the Swarm which is no longer valid.
Yeti (a.k.a. snow beasts) were fauna which live on Kaldir, a protoss-settled ice world in the Koprulu Sector. A large number of them reside in the Ice Valleys. They are led by yeti matriarchs.
The Yeti is an ape-like mythological creature, said to inhabit the Himalayan region of Nepal, India and Tibet.