A relative of the now-domesticated llama, the guanaco -- Patagonia's largest land vertebrate -- roams the plains of Torres del Paine. Guanacos live in groups, usually a single dominant male ...

Guanacos have a unique problem when it comes to reproducing. They must gather in November at exactly the right time of day to give birth so the newborn can dry out on its own. A guanaco’s too ...