Why female degus share a nest: it's a family matter
In its native range in Chile, a wild degu doesn't pick its nestmates at random: the females sharing the same overnight nest are almost always relatives. Ebensperger, Hurtado, Soto-Gamboa, Lacey and Chang published a landmark study on communal nesting and kinship in degus in the journal Naturwissenschaften in 2004, using radio-tracking to show that adult females form stable associations of two to four individuals sharing the same nest site, with average genetic relatedness far higher than between randomly paired females in the population (research on Google Scholar). Find our comparisons in the bedding and habitat section.
A social choice that's far from arbitrary
This result shows that group living in degus isn't simple neighborly tolerance: nesting associations form preferentially between related individuals, suggesting shared benefits — predator protection, thermoregulation, cooperative pup care — that pay off more when nestmates belong to the same lineage.
What this means in captivity
A degu kept alone remains a social species denied a core need; introducing a group of related females, rather than unrelated individuals thrown together at random, comes closer to the social structure seen in the wild and limits territorial tension. Our guide on what cage to choose for a degu covers the space needed to house a small group properly.
A social need tied to its diurnal rhythm
This group living connects to another well-documented trait of the species: unlike most pet rodents, degus are active during the day. Our article on natural light and the degu's circadian rhythm covers how this diurnality shapes both its light exposure and its daily social interactions with the rest of the group.
Frequently asked questions
Can unrelated female degus be housed together?
It's possible with a gradual, careful introduction, but field data suggest cohabitation between related individuals tends to be more stable and closer to the species' natural behavior.
Should males also be housed in groups?
Available data mainly cover nesting associations between females; housing adult males together calls for more caution and enough space to limit conflict.
Does a lone degu show visible signs of distress?
A lone degu may appear to cope on the surface, but it's still missing social interaction essential to its species; adding one or more companions remains recommended unless a vet advises otherwise.
This guide is part of Planète Pets’s Rodents universe. Our advice is general in nature: for any health concern, your veterinarian remains the only reference.