The lizard that clones itself
The mourning gecko breaks the usual reptile rule that adults must live alone. The species is entirely female and reproduces by parthenogenesis, each gecko laying fertile eggs that hatch into near-copies of herself, no male required or even existing. Around houses and trees in its home range it lives in loose colonies, and that social wiring comes with it into captivity. A lone mourning gecko is not suffering, exactly, but a small group in a well-furnished vivarium is visibly more active, more vocal and more settled — this is one of the very few lizards that is genuinely a group animal.
Space and structure for a group
Give the colony height and cover rather than bare floor space: a tall, densely planted vivarium with broad leaves, cork tubes, bamboo hollows and branches at several levels. The furnishings are not decoration; they are the peace treaty. Several retreat sites at different heights mean a lower-ranking gecko can always break the line of sight and disappear, which is how small lizards end arguments without injuries. A gentle warmth gradient across the enclosure lets individuals choose their own temperature instead of competing for one perfect spot.
Feeding a hierarchy
Communal living works when nobody has to fight for dinner. Offer the fruit-based gecko diet and live insects at several small feeding ledges spread around the enclosure, never at a single bowl that one confident gecko can sit in and own. Spread food out, and the shyest animal in the group still eats in peace. Then watch condition, not just behaviour: weigh or at least eyeball the smallest geckos regularly, because a gecko that is slowly slimming while the others thrive is being managed out of the food, quietly and without a single visible fight.
Reading colony politics
A colony is not silent. Chirps, squeaks and short chases are normal negotiation, and a new pecking order after a rearrangement or a new arrival settles within days. Step in when the signs turn from talk to harm: one gecko persistently excluded from food and warmth, bite marks, a dropped tail, a juvenile that stops growing while its sisters race ahead. Adding plants and barriers fixes most disputes; splitting the group is the last resort, and even then the separated gecko does better moved into a second colony than kept alone for long.
The population question
Here is the part to plan for before it plans itself: a contented colony grows. Females glue their eggs inside bamboo, hides and the corners of the glass; the eggs hatch in place, and although adults may eat some hatchlings, numbers still climb steadily. Two geckos is a temporary state. Decide early whether your colony's future is a larger enclosure, a second setup, or a standing arrangement to rehome youngsters — because the geckos will not be consulting you. With several nearly identical geckos in the colony, relatives you pick can open the geckos' profile themselves once you grant them access through KinsLe's Family Sharing, instead of relying on somebody else's description of the colony.