Llamas are woolly mammals related to camels. These herding  animals were domesticated thousands of years ago in the Andes Mountains of western South America.  Llamas are great pack animals, and are raised for their wool.  Even their droppings are used as fuel, and fertilizer!
The llama (Lama glama) is a South American camelid, widely used as a pack animal by Andean cultures since pre-hispanic times. In popular culture llamas are mostly associated with the Incans and Peru.
The height of a full-grown, full-size llama is between 1.7 meters (5.5 ft) and 1.8 meters (6 ft) tall at the top of the head. They can weigh between approximately 130 kilograms (280 lb) and 200 kilograms (450 lb). At birth, a baby llama (called a cria) can weigh between 9.1 kilograms (20 lb) and 14 kilograms (30 lb). Llamas are very social animals and like to live with other llamas as a herd. Overall, the fiber produced by a llama is very soft and is naturally lanolin free. Llamas are intelligent and can learn simple tasks after a few repetitions. When using a pack, llamas can carry about 25% to 30% of their body weight for several miles.
Llamas appear to have originated from the central plains of North America about 40 million years ago. They migrated to South America and Asia about 3 million 
years ago. By the end of the last ice age (10,000–12,000 years ago) camelids were extinct in North America.  As of 2007, there were over 7 million llamas and alpacas in South America and, due to importation from South America in the late 20th century, there are now over 100,000 llamas and 6,500–7,000 alpacas in the US and Canada.

Behavior
Llamas which are well-socialized and trained to halter and lead after weaning are very friendly and pleasant to be around. They are extremely curious and most will approach people easily. However, llamas that are bottle-fed or over-socialised and over-handled as youngsters will become extremely difficult to handle when mature, when they will begin to treat humans as they treat each other, which is characterized by bouts of spitting, kicking and neck wrestling. Anyone having to bottle-feed a cria should keep contact to a minimum and stop as soon as possible.
When correctly reared spitting at a human is a rare thing. Llamas are very social herd animals, however, and do sometimes spit at each other as a way of disciplining lower-ranked llamas in the herd. A llama's social rank in a herd is never static. They can always move up or down in the social ladder by picking small fights. This is usually done between males to see who becomes alpha. Their fights are visually dramatic with spitting, ramming each other with their chests, neck wrestling and kicking, mainly to knock the other off balance. The females are usually only seen spitting as a means of controlling other herd members.
While the social structure might always be changing, they live as a family and they do take care of each other. If one notices a strange noise or feels threatened, a warning bray is sent out and all others come to alert. They will often hum to each other as a form of communication.
The sound of the llama making groaning noises or going "mwa" is often a sign of fear or anger. If a llama is agitated, it will lay its ears back. One may determine how agitated the llama is by the materials in the spit. The more irritated the llama is, the further back into each of the three stomach compartments it will try to draw materials from for its spit.

Llama Fun Facts! 
Llamas typically live to be between 15 and 28. 
Llamas don't have hooves! They have two-toed feet with toenails on top and pads on the bottom. 
Baby llamas are called Crias.
Llamas make an unusual humming sound. 
Llamas are 3-4 feet tall at the shoulder.
Llamas are herbivores, and they have a three-part stomach!