The nocturnal fawn hopping mouse tends to live in family groups, usually comprising two to four individuals (2). During the day, it dwells in burrows which measure up to one metre deep and have between one and three entrances (2). At night, the fawn hopping mouse ventures out to forage. Seeds are the primary component of the fawn hopping mouse’s diet, but it will also eat small pieces of vegetation, as well as insects (2). When travelling rapidly, the fawn hopping mouse hops on its hind feet, but when travelling slowly it moves rather awkwardly on all fours (4).
Like other members of the Notomys genus, the fawn hopping mouse does not need to drink water, an incredibly useful adaptation in its harsh, arid habitat. Instead, this species has the ability to turn some of the carbohydrate obtained from seeds into water, and is able to reduce the amount of water lost in its urine and faeces (6).
The fawn hopping mouse will only breed when the conditions are suitable (2), often resulting in great fluctuations in the population size (1). Females give birth to between one and five individuals after gestation period of 38 days (1) (4). The young, which are born in a nest chamber lined with leaves and other plant material (4), weigh just 2 to 4 grams at birth, and do not open their eyes until 18 to 28 days old. The young cling to their mother’s nipples and are carried about in this manner until they are weaned at around one month old (7).