The southern big-eared mouse is a nocturnal herbivore, although it may sometimes be active during the day.

Southern big-eared mice breed throughout the spring and summer, and typically give birth to litters of four or five young.

The southern big-eared mouse has a relatively heavy build for a mouse, accentuated by its thick fur.

However, various other local predators, including lesser grisons, zorros, and buzzard-eagles, may also include southern big-eared mice in their diets.

Southern big-eared mouse (Loxodontomys micropus)

The southern big-eared mouse (Loxodontomys micropus), also known as the southern pericote, is a species of rodent in the family Cricetidae.

The southern big-eared mouse is found in the Andean foothills of southern Chile and south-western Argentina, from about 38 S down to the Straits of Magellan.

The southern big-eared mouse (Loxodontomys micropus), also known as the southern pericote, is a species of rodent in the family Cricetidae.