The South American marsupial Dromiciops gliroides is native to the temperate rainforests of the southern Andes in Chile and western Argentina. The lifestyle of the monito del monte is arboreal and nocturnal and the species eats mainly insects, other invertebrates and fruit. D. gliroides must endure seasonal periods of food shortages and cold temperatures in its habitat. In order to survive these environmental stressors the monito del monte can enter a torpid state. Torpor is an energy-saving strategy that involves a physiologically controlled depression of metabolic rate and body temperature. The monito del monte can use both short bouts of daily torpor or can enter a multi-day prolonged torpor during hibernation and is the only known South American mammal that hibernates.