Relatives of the flame, are the largest terrestrial vertebrates from Patagonia. Gregarious animals living in groups composed of a territorial male and up to ten females and their offspring. Young guanacos remain in the group until they reach maturity, at which point the male about a year also known as chulengos are expelled. They form separate herds, occasionally challenging the territorial males to seize females. The guanaco lives to the fullest extent of the steppe to a height of 5,570 meters. His favorite food is a common grazing chorion in the area.