The Alpaca (Lama pacos) is a domesticated species, member of the family camelidae, derived from the vicugna and have been bred for thousands of years. They are kept in herds in the Andes mountains, Chile and Bolivia. Estimates of the total number of Alpacas are around two million animals living in the Andes. Their wool is used for making ponchos, and other types of clothing. Interbreds of Alpacas and llamas are called huarizos. Alpacas may communicate using soft hums or other vocalizations, and with body language, such as neck posturing, ear and tail positioning, and head tilt. They can become 15 - 20 years of age.