If llamas are the laid-back stars of the Andes, their cousins, the guanacos, are the free spirits of Patagonia. Guanacos are part of the same camelid family as llamas, alpacas and vicuñas. But unlike their domesticated relatives, they keep things wild. Found mainly in Argentina, Chile, Peru and Bolivia, they're built for life at high altitude. Their thick coats help them handle chilly winds, while their padded feet give them the grip to trek across rocky terrain that would even make mountain goats nervous.

Social creatures, guanacos usually hang out in herds—led by a dominant male who keeps a close eye on the group. Communication is key in their world. Spot a predator, and a guanaco will let out a sharp bleat that basically means, 'Run for it!' These wild wanderers also play an important ecological role. As grazers, they help maintain grassland balance, and their droppings enrich the soil, keeping Patagonia's ecosystem healthy. So today, while llamas bask in attention—decked out on mugs, memes and Christmas sweaters—take a moment to nod to their untamed kin.