Mourning Gecko Weight Chart by Age
| Hatchling | ~0.1–0.3g |
| 6 months | ~1.5–3g |
| Adult | ~2–4g |
A genuinely tiny species
Mourning geckos are far lighter than most other popular pet reptiles — a healthy adult commonly weighs only 2–4 grams, so even a fraction of a gram of change matters proportionally, and tracking weight needs a scale accurate to at least 0.1g.
Rough weight ranges by age
Hatchling (first days): roughly 0.1–0.3g. 1 month: roughly 0.3–0.6g. 3 months: roughly 0.8–1.5g. 6 months (approaching adult size): roughly 1.5–3g. Full adult: commonly 2–4g.
Body condition alongside weight
A visibly padded tail base and full, rounded body signal good condition; a pinched, thin tail or visible hip bones suggest underweight. Because individuals and clonal lineages vary slightly in size, body condition alongside weight gives a fuller picture than either alone.
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A single adult mourning gecko needs a minimum 12"x12"x18" front-opening, well-ventilated enclosure — taller matters more than wider since this species is highly arboreal — furnished with cork bark, branches, and dense foliage for climbing.
A complete mourning gecko setup needs a tall 18"+ front-opening enclosure, cork bark and branches for climbing, coco fibre/moss substrate, a misting routine to hold 60–80% humidity, and complete MRP powder — no heat lamp is required in most homes.
Hatchlings can start in a small (roughly 5"x5"x8") enclosure to make food easier to find, juveniles move up around a few months old, and adults need a minimum 12"x12"x18" vertical enclosure.
Mourning geckos generally do best at normal room temperature, roughly 75–82°F, and can suffer heat stress above about 82°F. Most homes need no basking bulb or heat mat at all — just monitoring during hot weather.
Low-level UVB (roughly 5–6% output) is increasingly recommended as good practice, though it isn't strictly mandatory for mourning geckos the way it is for a strongly basking desert species — their diet's built-in D3 from MRP covers much of the gap.
Mourning geckos need roughly 60–80% humidity, achieved through misting once or twice daily, with good ventilation to prevent the dampness from turning stagnant.