Maras are from the family Caviidae, which includes Cavies, such as their larger relative the Capybara, and Guinea pigs.
In the wild, they form livelong monogamous pairs and spend most of their time with their mate, travelling as a pair. Maras young, called pups, are kept in a communal burrow called a crèche. Up to as many as 15 pairs of Mara may deposit their young in one crèche. Mara pups are well developed and can start to graze within 24 hours of birth. However, they remain in the crèche for up to four months where mothers return several times a day to nurse their young. Maras usually produce two young per litter and produce three to four litters per year.