As we arrived for lunch just outside Cajas National Park, an alpaca greeted our bus by rolling on the puddled driveway right in front of us. It seemed to enjoy scratching its back on its gravel surface. Some of us initially thought it was a llama, but I subsequently learned that alpacas are smaller than llamas, and are not bred to be beasts of burden. They are bred for their fiber, which can be turned into knitted and woven items similar to wool.