Due to its elusive nature, there is not a great deal of information on the small-eared zorro in the wild. It is known to be a largely solitary creature, although it has been seen hunting in pairs, and while it is largely diurnal, it has also been observed active at night. It has an incredibly varied diet; it primarily eats fish but also consumes insects, mammals (including agoutis, marsupials and small rodents), birds, reptiles, frogs and fruit (5).
Based on the quantity of fish in its diet, combined with the partial membrane between the digits of its feet, the small-eared zorro is believed to be at least partially aquatic (3).
It is thought that the female small-eared zorro gives birth in May or June, using the burrows of other animals or hollow logs as a den for the young (5).