Llamas were domesticated and used for more than 4000 years. Males were used for work, since their meat was too tough; females were kept for mutton-like meat and milk. Llamas' coarse wool provides fiber for materials, long hair for rope, skin for leather, tallow for candles, and dried manure for fuel. These 3-4.3 feet high South American ruminants are white, sometimes blotched with black/brown, or pure white or black.