One very distinctive identifying feature is a spot of ochraceous-orange fur on both sides of the nose. All the specimens have a conspicuous moustache of short black hairs on the upper lip with stiff, longer white hairs underneath. C. sociabilis forages just outside the burrow opening, emerging to about its waist. It crops vegetation in a circle around the entrance. Reproduction C. sociabilis is a seasonal breeder.
Sexual maturity is reached at about nine months of age.
Breeding takes place during the austral winter months of July and August. Since this time of year is before an increase in ambiant temperature and before any vegetation flush, it is likely that reproductive physiology and behavior are triggered by photoperiod cues. Litter size ranges from 2 to 6 young. The young are born very precocial. In captivity they have been observed to be fully furred, have their eyes open, and to move about the tunnel system within the first 24 hours.