A mourning gecko's enclosure belongs on a stable shelf or desk in a quiet room with steady, moderate temperatures — a bedroom or study, against an interior wall, out of direct light. Mourning geckos are among the smallest lizards anyone keeps: delicate, nocturnal, big-eyed geckos that live in loose colonies and, unusually, reproduce without males, each female producing fertile eggs that hatch into near-copies of herself. Their enclosure is usually a compact planted vivarium, and its placement is a study in protecting something tiny from a large household's accidents.
Stability is everything at this scale
A small enclosure changes temperature and humidity far faster than a large one, so the room around it must change slowly. Interior walls beat exterior ones, rooms away from sunny windows beat bright ones, and spots near radiators, heating vents, or air-conditioning outlets are the worst in the house — each cycle of the heating system swings a little vivarium's climate. Direct sun is a genuine emergency risk for an enclosure this size. Mourning geckos are comfortable at the moderate temperatures most homes already hold, which makes an ordinary lived-in room, away from the extremes listed above, the easiest correct answer in reptile placement — no special hot room required, and a hot room actively ruled out.
A shelf a household cannot knock
Because the enclosure is small and light, its enemies are elbows, vacuum cleaners, stacks of books, and shelves crowded with objects that get pulled past it. Choose a dedicated spot with clearance on all sides, at a height where you can mist and feed comfortably and see in at gecko level, but where passing traffic never brushes it. A wall-mounted or heavy bookcase shelf in a low-traffic room is ideal; a wobbly side table in a hallway is not. Keep the spot out of reach of cats, who find a vivarium of tiny moving geckos endlessly interesting, and remember that mourning geckos vocalize and move at night — light sleepers may prefer the colony's chirping somewhere other than the bedside wall.
Escape-proofing starts with the room
Adult mourning geckos squeeze through modest gaps; hatchlings pass through gaps that look sealed, including around cable ports and door corners. Place the enclosure in a room with a door that closes, limited hiding architecture at floor level, and no open vents, because a room you can search and seal is your second line of defense when a baby gets out during maintenance. Do maintenance over the enclosure's own footprint in that same room, never carrying an open vivarium across the house. The room should also be one where insect feeders and misting supplies live within arm's reach, since daily small tasks done in place disturb the colony least.
A colony that grows needs a shared census
Unlike a single pet, a mourning gecko group changes: eggs appear glued in bamboo and corners, hatchlings materialize, and a colony of four becomes a colony of nine while nobody was counting. Someone in the household should keep a running note of eggs seen, babies spotted, and feeding amounts, and everyone who mists or feeds should read it — overfeeding a growing group and underfeeding one look similar from outside the glass. KinsLe Family Sharing keeps this mourning gecko colony's profile and care notes shared with the household, so egg sightings, hatchling counts, and feeding records stay in one place as the little population grows.