Llamas are the biggest of the three. They are strong, calm and stubborn, and have been used for thousands of years as 'pack animals' - carrying bundles up steep mountain paths. A grown-up llama can carry about 25-30 kilograms all day long, but if you load it with too much, it just sits down until you take some off.
Alpacas are smaller and fluffier, and grown mainly for their wool. Alpaca wool is softer than sheep's wool, warmer for its weight, and comes in more than 20 natural colours, from snow-white to chocolate-brown to black. Many Andean families still weave it into blankets and ponchos by hand.
Vicuñas are the wild cousins - smaller, sandy-coloured, and very fast. Their fleece is one of the finest wools in the world. Vicuñas are not kept as pets or farm animals; they live free on the high plains. Once a year, communities gently round them up, shear a little of their wool, and let them go again.
All three are famous for spitting when they are annoyed. It looks rude, but it's how they say 'back off' to each other (and sometimes to people). Most of the time, they are gentle, curious animals with very long eyelashes and a habit of humming softly to their babies.

