The chuchaki were camel-like quadrapeds native to the planet Obsidian, used by the natives for riding and as beasts of burden. The chuchaki was a pacer, meaning it stepped with both right feet, then both left feet, giving it a swaying gait. The nomadic tribes of Obsidian also wove chuchaki hair into material for their tents. (TOS novel: Vulcan's Forge)