The big laucha lives in South American grasslands and marsh edges and is mainly active at night. It shelters under vegetation and in holes.
Its back is dark gray-brown and its underside gray. It has large ears, tan feet, and a sparsely haired tail with different colors above and below.
It is mainly nocturnal. In Paraguay it has been found in grasslands, palm savanna, and dry marshes, and uses grass, holes, stumps, or rock crevices for shelter.
An extinction-risk assessment has not been added yet.