Trust is good, but control is better!
While other rodents aren't particularly faithful, the mara is monogamous. If a compatible pair finds each other in the Pampa, the grasslands of Patagonia, they stay together for life.
The female, however, is followed everywhere she goes by her mate. The reasons for this male control are not based on unfounded jealousy. Since the female is fertile only twice a year for a few hours at a time, he simply cannot afford to have another male around during that time.
Although maras form monogamous pairs, several of them share a communal burrow. While each mother takes care to nurse only her own young by recognizing them by scent, every now and then a foreign young one manages to get a sip as well.
| Order | Rodents |
| Family | Guinea pigs |
| Distribution | Central and Southern Argentina |
| Habitat | Open scrubland and grasslands, semi-steppes, pampas |
| Food | mainly grasses and herbs |
| Activity | Maras are diurnal animals |
| Weight | 8β16 kg |
| Size | Body length: 65β75 cm |
| Service life | 15 years |
| Reproduction | After a gestation period of 3 months, 1β3 young are born, which remain with their mother for about 9 months. Maras nurse their young while sitting. |
| Risk | Their numbers are declining due to the loss of habitat to agriculture, as well as competition from the European hare, which has been introduced to South America. |
| Enemies | Puma, various other predators (fox, mustelids), humans |